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Nov 06

Horse DNA similar to humans

Posted on November 6, 2009 | 0 Comments

By James G. Robertson, National Geographic Digital Media

Scientists have finished a three-year project decoding the genome of the horse and have found something about the human genome in the process.

The researchers from the Massachusetts Institute of Technology and Harvard University found lots of similarities between the DNA of a horse and that of humans, including large sections of chromosomes that change little between the two species.
HorseGenome.jpg
Photo: Twilight, the horse whose genome was studied.  Courtesy Doug Antczak, Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University

Horses suffer from about 90 genetic diseases that resemble human genetic diseases, making the research important in finding cures for horse diseases as well as possibly important in curing some human diseases.  Researchers have already found the cause of a specific coloring that is also linked to a kind of night blindness.  The researchers also made a new discovery about how chromosomes function.

The DNA from the female thoroughbred Twilight was also compared to other horse breeds, and the researchers found about 1 million differences in the genomes, showing the genetic diversity in the horse species.



 





Prompt action is needed at the federal level to limit the number of invasive pythons released into the wild, South Florida Water Management District (SFWMD) Deputy Executive Director George Horne said in written testimony to the U.S. Congress today.

The House of Representatives Subcommittee on Crime, Terrorism and Homeland Security is considering a Bill that would classify nonnative pythons, such as the Burmese python, as "injurious animals" and ban their importation into the United States.

what-a-python-eats.jpg

Hypothetical diet necessary for a hatchling Burmese python to reach 13 feet in the Florida Everglades (approximately 5 to 7 years)

1 raccoon
1 oppossum
4 five-foot alligators
5 American coots
6 little blue herons
8 ibises
10 squirrels
15 rabbits
15 wrens
30 cotton rats
72 mice

This illustration, along with the photos on this page recently killed in the Everglades, was appended to the SFWMD written testimony handed to Congress today.

(Source: Skip Snow, Everglades National Park & Dr. Stephen Secor, University of Alabama)

"As a top predator and prolific breeder, these exotic snakes threaten state and federal efforts to restore America's Everglades, and they prey on the natural wildlife that call the Everglades home, including species already threatened or endangered," SFWMD's Horne said in its testimony to Congress today.

"We have a long history of successful invasive plant management and experience, but only recently have we had to commit more and more resources to the emerging populations of the Burmese python and other nonnative constrictors appearing across our landscape.

python-killed-in-Everglades-photo-1.jpg
"If effective preventative programs were in place to limit introductions of nonnative constrictors, such as the legislation now under consideration, these much-needed taxpayerfunded resources could be redirected to other important resource management efforts.

"Today, however, the negative impacts from the unlimited importation of new pest animals require active responses on our part. Effective prevention of additional introductions of potentially invasive constrictor snakes, as proposed in this Bill, is the only path to prevent these costs from continually increasing."

While Florida, California and Hawaii are among the states most impacted by introduced invasive species, every state is affected, Horne added.

Photo of Burmese python killed in Florida courtesy of SFWMD

"Globally, exotic invasive species, including pest animals, weeds and pathogenic diseases, are a major cause of global biodiversity decline. In particular, nonnative animals compete for food and habitat, upset existing predator/prey relationships, degrade environmental quality, spread diseases and, in our case, may threaten the integrity of flood protection levees and canal banks, and electrical power delivery.

"Nationally, more than 50,000 species of introduced plants, animals and microbes cause more than $120 billion in damages and control costs each year. Already, 192 non-native animal species are established in Florida, calling for the development of methods to forecast and respond to the potential economic loss, environmental damage and social stress caused by both new non-native animal introductions and long-established invasive organisms."

python-killed-in-everglades-photo-2.jpg

The Bill before Congress makes an important contribution towards prevention by limiting the importation of two snake species (the Burmese and African python) with high invasion potentials in the U.S., Horne said.

"The amendment could also be expanded to include all giant constrictor species determined by the U.S. Geological Survey, or USGS, to have medium or high invasion risk potential. The recently published USGS risk assessment for giant constrictors ranked nine species as having either a medium or high overall risk potential for invasion in the United States.

"These species include the Beni Anaconda, boa constrictor, Burmese python, DeSchauensee's anaconda, green anaconda, northern African python, southern African python, reticulated python and yellow anaconda.

Photo of Burmese python killed in Florida courtesy of SFWMD

"We strongly support inclusion of these species in [the Bill] in order to immediately limit importation of species that our best science predicts will be invasive. Rather than wait for the next Burmese python to become established in the United States, a proactive approach such as the proposed legislation being discussed today is urgently needed to protect our environment, economy and quality of life--not just in Florida but throughout the nation."

The South Florida Water Management District is deeply committed to preserving and restoring South Florida's environmental health and, unfortunately, the Everglades ecosystem is now home to the invasive Burmese python, Horne said.

python-picture-a2.jpg

Photo of eggs in Burmese python killed in Florida courtesy of SFWMD

The snake is a top predator that is known to prey upon more than 20 native Florida species. Notable among these are the federally listed Key Largo wood rat, white-tailed deer, American alligator, bobcat and numerous wading birds common to the Everglades, including the wood stork.

"Attempts to manage Burmese pythons divert taxpayers' funds from these other urgent primary restoration and protection tasks. Yet, failure to do so will leave this aggressive animal as a serious impediment to our Everglades restoration progress," Horne said.

Small livestock likely prey

The Burmese python also threatens agricultural interests as small livestock are also likely prey, Horne added.

Since 2000, the South Florida Water Management District and Everglades National Park, have removed 1,248 Burmese pythons from the Everglades.

"Adverse experience already gained in Florida strongly indicates the need to regulate the importation and sale of this snake. Without stronger regulation and control resources, adverse impacts of Burmese pythons will continue to get worse, and the python's population will continue to expand north of the Everglades and likely into South
Florida's urban areas."

python-picture-a3.jpg

Photo of Burmese python nest eggs in Florida courtesy of SFWMD

Florida's other nonnative giant constrictors

Given South Florida's abrupt boundaries between dense human population centers and vast subtropical wilderness areas, it comes as no surprise that numerous giant constrictor species have been observed in Florida, Horne said.

"While most observed animals are presumed to be released pets, three additional constrictor species are now considered established or potentially established in Florida--the common boa, northern African python and yellow anaconda.

"All three species are identified in the USGS risk assessment as having a high overall risk of establishment in the
United States. The common boa has been repeatedly observed in South Florida, primarily on the Deering Estate in eastern Miami-Dade County, but also near Everglades National Park.

"Between 1989 and 2005, 96 common boas were captured in South Florida.

"Recent confirmed sightings of northern African pythons near the eastern boundary of the Everglades and yellow anacondas near Big Cypress National Preserve and Myakka State Park in southwest Florida are also cause for alarm."

"Recent confirmed sightings of northern African pythons near the eastern boundary of the Everglades and yellow anacondas near Big Cypress National Preserve and Myakka State Park in southwest Florida are also cause for alarm. All three of these species share traits with the Burmese python that are considered important factors for invasive potential, and like the Burmese python all three species will be very costly to control should they become widely established."

burmese_python-picture-6a.jpg
Burmese python photo courtesy of South Florida Water Management District

As the South Florida Water Management District and other agencies try to contain the documented damage and growing threat of the Burmese python and other invasive animals in Florida, the flow of potentially harmful exotic animals across U.S. borders continues, Horne said.

"To use just one example, roughly 144,000 boa constrictors were imported into the United States between
2000 and 2007.

Federal action is needed now to address the immediate threat posed by giant constrictors which have or are likely to establish in our nation's wilderness areas."

Can we eat our way to a better future for the planet's climate? Only if we become more responsible farmers.

The twin battles to improve food security for a growing world population and contain climate change can be fought on the same front--the world's farmland, the United Nations Food and Agricultural Organization (FAO) said today.

"Agriculture not only suffers the impacts of climate change, it is also responsible for 14 percent of global greenhouse gas emissions. But agriculture has the potential to be an important part of the solution, through mitigation--reducing and/or removing--a significant amount of global emissions," FAO said in a statement.

Ethiopia-farm-picture.jpg

NGS photo of farming in Ethiopia by James P. Blair

Some 70 percent of this mitigation potential could be realized in developing countries, the agency believes.

"Many effective strategies for climate change mitigation from agriculture also benefit food security, development and adaptation to climate change," said FAO assistant director-general Alexander Müller. "The challenge is to capture these potential synergies, while managing trade-offs that may have negative impacts on food security."

The FAO released its report, Food Security and Agricultural Mitigation in Developing Countries: Options for Capturing Synergies, during the Barcelona Climate Change Talks this week.

COP15-logo.jpg
The Barcelona talks are the last negotiating session before the UN Climate Change Conference in Copenhagen next month. The Copenhagen meetings include the 15th Conference of the Parties (COP 15) to the United Nations Framework Convention on Climate Change, and there are high hopes that the talks will produce global consensus for a workable plan to reduce greenhouse gas emissions beyond 2012.

Scientists have warned that if carbon dioxide levels in the atmosphere continue to rise because of human activities the planet's climate could change drastically, setting off intense warming, droughts, flooding and rising sea levels.

South-Africa-farming-picture-2.jpg

NGS photo of farming in South Africa by Kip Ross

One of the options that could be part of the climate change mitigation is climate-smart farming.

The most important technical options for climate change mitigation from agriculture are improvements in cropland and grazing land management and the restoration of organic soils and degraded lands, FAO said today.

"Nearly 90 percent of the technical mitigation potential of agriculture comes from soil carbon sequestration. These options involve increasing the levels of organic matter, of which carbon is the main component, in soil. This can translate into better plant nutrient content, increased water retention capacity and better structure, eventually leading to higher yields and greater resilience."

Agricultural mitigation options that sequester carbon can include:

  • low tillage
  • utilizing residues for composting or mulching
  • use of perennial crops to cover soil
  • re-seeding or improving grazing management on grasslands.

Other options involve difficult trade-offs, FAO noted, with benefits for mitigation but potentially negative consequences for food security and development. "In some cases, there are synergies in the long-run, but trade-offs in the short-run."

Virginia-farm-photo.jpg

NGS photo of farm in Virginia, U.S., by Anne Francis Revis

"Biofuel production provides a clean alternative to fossil fuel but can compete for land and water resources needed for food production. Restoration of organic soils enables greater carbon sequestration, but may reduce the land available for food production. Rangeland restoration may improve carbon sequestration but involves short-term reductions in herder incomes by limiting the number of livestock."

Some trade-offs can be managed through measures to increase efficiency or through payment of incentives or compensation, the report says. "Many of the technical mitigation options are readily available and could be deployed immediately. But while these actions often generate a net positive benefit over time, they involve significant up-front costs."

Other barriers, such as uncertain property rights, lack of information and technical assistance or access to appropriate seeds and fertilizer, also need to be overcome. "Linking to ongoing agricultural development efforts that address these same issues is one cost effective way of doing this," said Kostas Stamoulis, director of the FAO Agricultural Development Economics Division.

Japan-famring-photo.jpg

NGS photo of citrus farm in Japan by James L. Stanfield

The report outlines possible design features for financing mechanisms that could help unlock agriculture's potential benefits for climate change mitigation, food security and agricultural development.

"A range of financing options---public, public-private and carbon markets--are currently under negotiation for climate change mitigation actions in developing countries. These could be future sources of finance for agricultural mitigation actions, the report says, as could a dedicated international fund to support agricultural mitigation in developing countries and coordination with financing from official development assistance for agricultural development."

Farming-rice-in-China-photo.jpg

NGS photo of rice farming in China by James P. Blair

Despite its significant potential, agricultural mitigation has remained relatively marginal within the climate change negotiations. FAO said.

"To capture the multiple benefits of agriculture. the report recommends a work programme on agricultural mitigation within the UNFCCC Subsidiary Body for Scientific and Technological Advice to help address methodological issues related to implementation. It also proposes country-led piloting of action and field testing, using a phased approach linked to national capabilities and supported by capacity building and financial/technology transfers."

When newspaper photojournalist Pam Spaulding set out to photograph a year in the life of a new mother in 1977, little did she know where the project would take her.

Three decades on she was still photographing the McGarveys, a Louisville, Kentucky family that had grown to five, following daily activities and documenting milestones like births, graduations, marriages, and burials. She was chronicling the family's passage through life.

What became a lifelong passion, perhaps an obsession, for Spaulding has yielded a remarkable archive of photographs that tracks not only the everyday lives of one family, but also the granular details of the changing American way of life.

The only comparable work in the annals of documentary photography is the fascinating 25-year portrait of the four Brown sisters by Nicholas Nixon, says veteran National Geographic photographer Sam Abell. "But those portrait sessions are a once-a-year occurrence. The McGarvey project is of another order, and we are unlikely to see anything like it again."

American-Family-cover.jpg

Spaulding's intimate 30-year photographic study of a single middle-class family from Louisville is represented in An American Family: Three Decades with the McGarveys (National Geographic Focal Point; October, 2009; $35).

How did Pam Spaulding link up with the McGarveys, I asked her in an interview. "I called around Lamaze instructors to get the names of first-time parents. That's how I met John and Judy McGarvey. They were willing to listen to my idea about photographing the life of a new mother for a year. They agreed to a trial period. Then they never got rid of me," Spaulding said.

american_family_007.jpg
David, center, says the Pledge of Allegiance for the first time in kindergarten. Three of his classmates in the picture will stay with him through eighth grade. September 1982 (p. 26)

Photo by Pam Spaulding

What developed was a remarkable relationship, in which the photographer became all but invisible to the McGarveys, even inside their home. Her lens became so familiar it went unnoticed. Years later, when the children looked at the book of photographs of their lives, they remarked that they had not realized that the photographer had been among them on this and that occasion.

"I wanted to make a timeless picture of culture, a vsual history of what we Americans were like in this period of time," Spaulding said. "Already you can see in these photographs how things we used have changed, such as pay phones that have since started to disappear. Looking at these pictures also gives you a sense of how time changes bodies and relationships, seen when the same people are photographed over many years in the same places."

Spaulding has children of her own, but she has not documented their lives as she has those of the McGarvey family. "I couldn't be both an observer and a participant with my own family," she explained. "The photos I made of my own children were the photos any mother would make. I was looking at the McGarveys differently, from a side and through a wider lens that included the context of place and time."

american_family_005.jpg
Judy dresses Sara for her fourth birthday party, which featured a Cinderella theme including a neighbor playing the fairy godmother. May 1987 (p. 210)

Photo by Pam Spaulding

How did the children react to Spaulding's omnipresence in their lives, the woman pointing the camera at them even in some awkward moments? "I think they accepted me and liked what I was doing," the photographer said. "Why wouldn't they? I was there for them at their ball games and school plays."

Over the years the McGarveys saw few of the pictures Spaulding made of the family. She once overheard one of the children telling a friend not to be self-conscious about the photographer, who apparently shot many pictures, but never processed any of them. "They were generally pleased when they finally got to see the pictures," Spaulding said. "Although Morgan couldn't believe I published one of him sitting on the pot."

american_family_008.jpg
The family welcomes David home from a tour in Iraq. John, who rarely shows emotion, held back tears when the crowd at the airport broke into applause. November 2006 (p. 27)

Photo by Pam Spaulding

As Spaulding blended into the family's lives she came to know and appreciate their traditions and rituals. The project also changed her photography. "Shooting for a newspaper you want your pictures to be clean, very simple, and covering emotion. You shoot tight pictures. For the McGarveys I constantly had to tell myself to stand back, to shoot a wider scene. It was hard because it was not what I was doing on a daily basis for the newspaper."

So is the McGarvey project finally over? "No," Spaulding said. "I was there to photograph the birth of Sara, so how could I not be there to photograph the birth of her first child?"

Pam-Spaulding-photo.jpg

Pam Spaulding

Photo courtesy of National Geographic Books

National Geographic Books provided a review copy of An American Family: Three Decades with the McGarveys for this entry. 

The U.S. House of Representatives passed a Resolution today that condemns the unchecked illegal logging and decimation of Madagascar's endemic species, Congressman Earl Blumenauer (D-Oregon), author of the resolution, said in a statement published on his Web site.

"The House is sending a firm signal that the devastating and illegal destruction of Madagascar's natural resources will not be tolerated," Blumenauer said. "Illegal logging not only does irreparable harm to the environment, but it destroys livelihoods.

madagascar-space-image.jpg

"In Oregon and across the United States, at a time when we are working to recover the economy, illegal timber imports undermine legitimate logging operations.

"While Madagascar's de facto government continues to use its endangered resources to boost its regime, Congress today joined the administration in calling for an immediate end to these practices."

The Resolution responds to growing anxiety in the international conservation community that the continued plundering of Madagascar's few protected forests, for valuable rosewood and other timber, and with it the destruction of habitat vital for the survival of lemurs and numerous other rare species, has inflicted irreparable damage on the African island country's environment.

Satellite image courtesy NASA

Much of the California-size island has been eroded because of deforestation for farming. Most of the country's twenty million people are poor. Conservation projects such as national parks that would showcase Madagascar's abundance of endemic species were supposed to provide drawcards for tourists and researchers, creating income and work to kick-start local economies. But much of that is at risk because of recent political instability and the destruction of the forests.

There is also concern that what's been happening in Madagascar exacerbates the problem of worldwide illegal logging, which costs countries U.S.$10 billion-15 billion each year in lost revenues for legitimate lumber industries.

"Madagascar is home to almost 150,000 species of flora and fauna. The illegal extraction of these resources threatens biodiversity as well as legitimate logging operations in the U.S.--up to $460 million lost in export opportunities every year," Blumenauer said.

"After a coup in March, the new and weakened government of Andry Rajoelina issued sweeping decrees allowing the harvest and export of wood from protected forests and World Heritage Sites. The Obama administration has condemned the de facto government, and the Wildlife Conservation Society, the World Wildlife Fund (WWF), and Conservation International have denounced the wholesale exploitation of some of the world's most diverse forests and decimation of the local population's resources and livelihoods. These groups have strongly endorsed Blumenauer's resolution," the Congressman's statement said.

Madagascar-diversity-picture-1.jpg
Madagascar is legendary for its unusual animals and plants, such as this chameleon.

NGS photo by Luis Marden

The House voted 409-5 to join the administration and environmental groups in speaking out against the devastation occurring in Madagascar. The Resolution was co-sponsored by 49 members, representing both Democrats and Republicans and including Congressman Donald Payne (D-New Jersey), Chairman of the Subcommittee on Africa and Global Health on the Committee for Foreign Affairs, and Congressman Eni Faleomavaega (D-American Samoa), Chairman of the Subcommittee on Africa and the Global Environment.

Author of the Legal Timber Protection Act, Blumenauer is a global leader on the issue of illegal logging, his Web site states. The law, signed in May 2008, bans the import of illegally harvested timber and wood products and empowers regulators to keep illegally harvested timber out of the U.S.

madagascar-diversity-picture-2.jpg
Most species of baobab trees are found only in Madagascar.

NGS photo by Luis Marden

Commenting on today's House resolution, John Calvelli, Wildlife Conservation Society Executive Vice President of Public Affairs, said, "The situation in Madagascar is nothing short of tragic--not only for the people and wildlife of Madagascar, but for the entire planet. I applaud Congressman Blumenauer for his continued leadership in the United States Congress on the issue of illegal logging. This resolution will serve as a clear message to the current Malagasy government that the illegal harvesting of Madagascar's natural resources is unacceptable."

Said Lisa Steel, Deputy Director for Madagascar at WWF, "The loss of Madagascar's spectacular biodiversity would not only be a global tragedy, but it will further impoverish rural communities whose lives are inextricably tied to the health of their natural environments. While Madagascar is under the rule of a weakened government, it is essential that the international community work to stop the harvest and trade of illegal wood and other protected species, and we appreciate this important first step by Congressman Blumenauer."

"Congressman Blumenauer continues to play a leadership role in the global problem of illegal logging and the responsibility of consumer nations like the U.S. to support the fight against it, through policies like the Lacey Act and this resolution," said Alexander von Bismarck, executive director of the Environmental Investigation Agency, which conducted a mission to Madagascar in August 2009 to evaluate the illegal logging situation.

Full text of the Resolution passed by the U.S. House of Representatives today:

H. RES. 839
Mr. BLUMENAUER (for himself, Mr. PAYNE, and Mr. FALEOMAVAEGA) submitted
the following resolution; which was referred to the Committee on Foreign Affairs

RESOLUTION
Condemning the illegal extraction of Madagascar's natural
resources.

Whereas Madagascar is the world's fourth largest island, and
home to up to 150,000 species of unique flora and fauna;

Whereas during the last 20 years, with the support of the
U.S. Government and others, Madagascar has made substantial
progress in stopping environmental degradation,
effectively managing natural resources and preserving its
unique biodiversity;

Whereas these natural resources provide essential benefits
and services for the basic needs of the majority of
Madagascar's people, three-quarters of whom live in rural
areas and two-thirds of whom live on less than $2 per
day;

Whereas these natural resources also provide economic development
in the tourism sector, drawing an estimated
$390,000,000 per year;

Whereas the Obama Administration has condemned Marc
Ravalomanana's forced resignation as President of the
Republic of Madagascar, and Andry Rajoelina's installation
as de facto head of state, as tantamount to a coup
d'etat, undemocratic, and contrary to the rule of law;

Whereas in March 2009, the Obama Administration announced
a suspension of non-humanitarian assistance to
the de facto Andry Rajoelina government;

Whereas, given that 2⁄3 of people live off the natural resources,
decreased assistance for conservation efforts is
having dire humanitarian consequences;

Whereas the African Union and the Southern African Development
Community have suspended Madagascar's participation
until constitutional order is restored;

Whereas in October 2009, the World Wide Fund (WWF),
Conservation International, and the Wildlife Conservation
Society condemned an interministerial order issued by the
current administration granting sweeping authorization
to export raw and semi-processed hard wood as
''legaliz[ing] the sale of illegally cut and collected wood
onto the market; allow[ing] for the potential embezzlement
of funds in the name of environmental protection
and constitut[ing] a legal incentive for further corruption
in the forestry sector'';

Whereas the following natural resource degradation is occurring
under the de facto government's watch--

(1) open and organized plundering of precious wood
from natural forests, including World Heritage Sites such
as Marojejy and Masoala National Parks;

(2) intimidation and menace of legitimate local community
management structures, and expropriation of revenue
and benefits from them, causing suffering and impoverishment;

(3) intensified smuggling of endemic and protected
species and species parts and/or products to the national
and international markets;

(4) proliferation of destructive practices such as illegal
mining and slash-and-burn agriculture within protected
areas and environmentally sensitive areas;

(5) degradation of forests, pushing some rosewood
and ebony species to the brink of extinction; and

(6) the degradation of the resource base upon which
rural communities depend representing an immediate and
future threat to local governance, local incomes, and food
security; and

Whereas the vast majority of this precious wood is destined
for global export markets: Now, therefore, be it
Resolved, That the House of Representatives--

(1) calls on people of Madagascar to immediately
undertake a democratic, consensual process
to restore constitutional governance, culminating in
free, fair and peaceful elections;

(2) strongly condemns the illegal extraction of
Madagascar's natural resources and its impact on
biodiversity and livelihoods of rural communities,
including illegal logging, smuggling of wild species,
and illegal mining;

(3) supports action by competent authorities
and the people of Madagascar to stop this illegal
devastation and bring those perpetrating these
crimes to justice;

(4) calls upon importing countries to intensify
their inspection and monitoring processes to ensure
that they do not contribute to the demand for ille10
gally sourced precious woods from Madagascar; and

(5) calls upon consumers of rosewood and
ebony products to check their origin, and boycott
those made of Malagasy wood, until constitutional
order is restored.

 

You might also be interested in:

madagascar-rosewood-thumb.jpg
The call to boycott Madagascar's rosewood and ebony explained
Conservation biologist Stuart Pimm writes about his observations of the diversity in Madagascar and how the current pillaging of the country's natural heritage threatens not only to destroy decades of conservation work, but also ruin the one chance that communities adjacent to national parks have to escape poverty.

Madagascar-thumb-photo-1.jpg

Conservationists Call on Malagasy People to Stop Forest Plunder
Eleven groups that fund and help manage conservation of Madagascar's remaining wilderness heritage issued a joint statement deploring the invasion by armed looters of national parks and forests, illegal timber extraction, illegal mining, and intensified smuggling of endangered species.

Madagascar-thumb-photo-2.jpg

Act Aggressively to Curb Illegal Logging, Madagascar Urged
Madagascar's efforts to curtail illegal logging in the World Heritage Sites of Masoala and Marojejy National Parks and their peripheral zones have not reduced the impact of logging in the immediate term, say governments, international agencies, and conservation groups that support conservation of the country's natural heritage.

Madagascar-thumb-photo-3.jpg

Lemurs, Rare Forests Threatened by Madagascar Strife
Looters are invading Madagascar's protected wildlife sanctuaries, harvesting trees and threatening critically endangered lemurs and other species. (March 2009)


 

About This Blog

David Braun
As head of National Geographic's daily online news service, David Braun has a front-row seat on developments in the fields of science, nature, and cultures. This blog will give you David's unique perspective on the news, including access to some of the interesting stories that don't make it onto the news site, behind-the-scenes details about life in the National Geographic newsroom, and David's insights into what's changing in our world, why, and what we can do about it.
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