Wednesday, August 3, 2011

Dinosaurs are booming in the Outback

Emory science majors pose with a life-sized statue of Muttaburrasaurus langdoni while crusing the Cretaceous of Queensland. Can you spot Paleontologist Barbie in this picture? You may have to click on the photo to enlarge it. Photo by Anthony Martin.

A dozen years ago, Australian rancher David Elliott came across a large bone while rounding up his sheep in the Queensland Outback. It turned out to be the femur of an 18-meter long sauropod – a piece of the largest dinosaur ever found in Australia.

The collecting bug bit Elliot, as more dinosaur fossils were dug up on his property. He and his wife, Judy, founded the Australian Age of Dinosaurs Center (AAOD) in Winton. The isolated Outback town, where poet Banjo Patterson wrote the classic tune “Waltzing Matilda,” is now a hub for dino tourism.

“Australia has often been regarded as ‘dinosaur poor,’” says Emory paleontologist Anthony Martin. “As a continent, there just hadn’t been a lot of material to study.”

Since Elliot’s initial discovery, the AAOD has amassed hundreds of bones, and more keep coming. “So far, they’ve named three new species of dinosaurs, and they suspect they have more,” Martin says. “There is a growing realization that a new age of dinosaurs is happening in Australia.”

Martin and geologist Steve Henderson of Emory’s Oxford College recently returned from leading nine students on a summer study abroad program in Australia. A highlight was a whirlwind paleo-tour of Queensland, including a stop at the AAOD.

“We wanted to give the students a taste of what life is like in the modern-day Outback, and 100 million years ago during the Cretaceous Period,” Martin says. “I hope they got an appreciation for the incredible natural history of Queensland, and the evolution of landscapes and life in that area of the world.”

Unlike the American West, which has a 100-year history of unearthing and studying dinosaur fossils, Queensland is at the beginning of uncovering a rich trove of the prehistoric past.

“You get to see the science as it's happening and feel the immediacy of discoveries,” Martin says.

Trish Sloan, the group’s guide at the AAOD, showed the students how to prepare a dinosaur bone, and gave them a glimpse of the center’s most recent finds. “I can’t talk about it, because it hasn’t gone through peer review yet,” Martin says. “But Trish was excited about new finds that may change people’s minds about the dinosaurs in the area.”

Read more about Down Under dinosaurs on Martin's blog The Great Cretaceous Walk.

Related:
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Monday, August 1, 2011

Do drones make killing too easy?


Dozens of countries are now producing unmanned aircraft known as drones, ranging from flying “spies” the size of insects to large planes equipped with missiles and bombs.

A soldier sitting at a computer in Nevada can be running lethal drones on the other side of the world.

“That to me is deeply problematic, when you make killing so easy, and when you remove the person so far from the site of the killing,” says Paul Root Wolpe, director of the Emory Center for Ethics. “The sense of having killed people becomes so abstract.”

Drone technology could develop to the point that enemy soldiers conduct entire battles against one another via computer, while sitting in fortified bunkers.

“This sort of strategy ends up protecting soldiers more, but exposing civilians more,” Wolpe says. “It will change the nature of warfare and raise a new kind of ethical calculus in the way in which warfare is conducted.”

Related:
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Monday, July 25, 2011

How to talk to real people

Not everyone speaks 'geek.' A graduate course aims to give students less technical ways to explain their science research. Credit: iStockphoto.com.

The New York Times "Education Life" writes about a new course at Emory:

Recognizing that scientists can be really, really hard to understand, Emory last semester introduced “Communicating Science” to teach grad students to write for and talk to laypeople. Students create presentations, blog and compose “elevator speeches” addressing various scenarios.

Pat Marsteller, a biologist, developed the course and co-teaches it with two chemists, which she says is good because most of the 23 students last term were chemists, who apparently speak a dialect. She says she had her work cut out for her: “The first day somebody said, ‘Why should I want to talk to anybody who doesn’t understand carbon?’”

Read the whole article in the New York Times
.

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Friday, July 22, 2011

Nazi eugenics versus the American Dream


It’s the year of genetically modified super heroes at the movies. The latest, “Captain America: The First Avenger,” is set in World War II, the era when the comic book character was introduced to readers.

“Captain America is the archetypal Marvel Comic,” says Paul Root Wolpe, director of the Emory Center for Ethics and a comic book fan. “You have the scrawny kid who wants desperately to do good. You have technology coming to his rescue. And then you have him modified to become this incredible fighting machine.”

The irony is that the Marvel story created an anti-Nazi figure by using genetics to perfect the human form, which is exactly what the Nazis were trying to do.

“Of course, the difference is that America does it in a way that doesn’t involve genocide or denigrating any other group,” Wolpe says. “They take a specimen that in Nazi ideology would be dispensable and say, all of us have within us the ability to be great, this guy just needs a little help.”

The ideology in the United States at the time was to help people who come here with disadvantages to live the American Dream, Wolpe says. “Captain America becomes a symbol of he way in which the United States thought about itself. I think because eugenic ideas were so much of what World War II was about, that different model of how genetic science can be used became a very powerful symbol of the difference between the German and American views of technology.”

Related:
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Thursday, July 21, 2011

What we can learn from African pastoralists

The most severe drought in decades is taking a terrible toll on even the rugged cattle breeds of southern Ethiopia. Despite the harsh environment, the pastoralist way of life endures. Photo by Peter Little.

By Carol Clark

Emory anthropologist Peter Little was in southern Ethiopia last February, during the height of a major drought that continues to scorch the Horn of Africa. He is researching how climate change is affecting livestock herders in the region. During the past year, drought has killed about 20 percent of the cattle, or about 225,000 animals, within Ethiopia’s Borana pastoralist community.

At a watering hole, Little watched herders bring their animals in from northeastern Kenya and Somalia, where the effects of the drought are compounded by armed conflict. “I was amazed by the skill and discipline of these herders,” Little says. “They got thousands of thirsty animals to line up like schoolchildren. Some of the camels hadn’t had water for seven days.”

First the herders themselves approached the water’s edge with buckets and canteens. Then the goats were sent in an orderly procession to drink, followed by the cattle, and finally the camels.

Double click on the photo, below, to get the panoramic view:
Calm amid the crisis: Despite drought, herders and their animals from Somalia and Kenya converge on an Ethiopian watering hole in a systematic order. Photo by Peter Little.

“We could learn a lot from African pastoralists about how to collectively manage resources,” Little says. He contrasts their cooperative use of extremely limited water supplies to the inter-state battles fought over Atlanta’s Lake Lanier reservoir, and the ever-shrinking Colorado River.

Related: Check out this satellite animation of the ongoing drought on Wired.com.

Pastoralists occupy about half of Africa, herding goats, camels, sheep and cattle through the semi-arid rangeland and savannah edging the continent’s deserts and tropical forests. Often garbed in striking traditional dress, pastoralists can be a boon to tourism, but a bane to governments that want to control the movements of people.

“If God wanted us to farm,” a Borana elder told one researcher, “He would have put four legs on a farm so we could move it.”

Pastoralists are the ultimate survivors, making a livelihood in harsh environments for millennia. At first glance they may seem like people subsisting on the margins of society, but the reality is much more complex. Pastoralists are on the vanguard of many of the biggest issues facing Africa: from the effects of climate change to disputes over land to wildlife conservation.

“There are a lot of misunderstandings about pastoralists, even among other Africans,” Little says.

In Ethiopia, pastoralists have developed an elaborate system of deep wells and covered cisterns – some of them 500 years old (see photo, at left).

Zoologists are intrigued by African pastoralist animal breeds, hardy enough to get by on less water and survive extreme heat. Cognitive psychologists are interested in the thought processes enabling pastoralists to continuously make life and death decisions on the fly. Ecologists can learn how grasslands are created and maintained over time by studying the practices of pastoralists.

Little is fascinated by the social networks and relationships that help give pastoralists their resiliency. His latest book, co-authored with John McPeak and Cheryl Doss is called "Risk and Social Change in an African Rural Economy: Livelihoods in Pastoralist Communities."

During the early 1980s, Little was one of the first anthropologists to do in-depth studies of the political aspects of environmental and food problems, a field now known as political ecology. In 2003, he published “Somalia: Economy without a State,” which refuted the conventional wisdom that Somalia’s economy, which is heavily dependent on pastoralism, deteriorated into chaos after the state’s collapse in 1991.

Certain sectors of Somali society, including pastoral communities, remained vibrant and dynamic, Little says. “The people showed incredible innovation. They learned to develop a unique set of informal finance, trade and banking institutions in order to survive and make a living.”
Afar herders of Ethiopia with their goats and camels. iStockphoto.com.

Top five myths about African pastoralists

Myth #1: The pastoralist lifestyle and land use are bad for the environment.

Pastoral traditions often play an intrinsic role in wildlife conservation, Emory anthropologist Peter Little says. “For instance, the Maasai, who raise cattle near national parks in Kenya and Tanzania, maintain grasslands and prevent the encroachment of invasive bush species in the parks, which are bordered by dense forests. Pastoral grazing systems tend to fit well with migratory herd species and other forms of biodiversity. In contrast, wildlife doesn’t do as well with fenced farming and more settled human populations.”

Myth #2: Pastoralists have little connection to the global economy.

Pastoralists play a vital role in many African economies, and hold the potential to drive more growth, Little says. Overland trucking routes and boats transport their livestock to supermarkets throughout northern Africa and the Middle East.

Pastoralism accounts for about 25 percent of gross national product (GNP) in Ethiopia and closer to 30 percent in Sudan. About 80 percent of foreign earnings for Somalia come from livestock. Somalia is one of the world’s top exporters of live animals, annually supplying as many as three million animals to the Gulf Arab states in the run-up to the annual haj.

Myth #3: Pastoralists are traditionalists who resist change, wander constantly, and are ruled by the sacred bond they have to their animals.

“Just because you don’t dress like everyone else doesn’t mean you’re opposed to modern technology,” Little says. “Many pastoralists use cell phones now to get information on rainfall, grazing or market prices.”

Or maybe they are just phoning home, since not every member of a pastoral system is necessarily mobile, Little adds. Some family members may have settled in towns where they attend school, own shops or sell livestock products, such as milk.

A Maasai herder, left, in traditional dress, carrying his cell phone. iStockphoto.com.


The movements of mobile pastoralists are dictated not by whim, he adds, but complex systems of land-use rights and changes in the seasons and weather.

And while animals may serve as powerful symbols in the religion and rituals of pastoralists, livestock are primarily a source of food and income. “They also value their animals as commodities,” Little says.

Myth #4: Large swaths of land in Africa are unclaimed and worthless.

Virtually no land in Africa is unclaimed or unused, Little says. What looks like barren wilderness to a casual observer is more likely a community’s source of forest products, like wood and meat, or part of a seasonal grazing area.

“Moving animals to follow rainfall patterns and pastures often makes good use of lands that can’t be cropped without expensive irrigation,” Little says.

Increasingly, however, foreign investors are willing to pay for that irrigation, he adds. Spurred by rising food prices, water shortages in their own countries, and interest in bio-fuels, investors from Europe, the Middle East and India have been buying and leasing hundreds of thousands of hectares in Africa in recent years to create large-scale, commercial farms, Little says. “Much of this land is being carved out of customary pastoralist grazing lands,” he notes.

Myth #5: Pastoralism is a disappearing way of life.

“Pastoralists have been an important fixture for millennia,” Little says, noting that they include many of the revered figures in the Bible and Koran. Consider the origins of the word “pastor.”

“Pastoralists may adapt and change, but as long as people eat meat, there will be some version of them around.”

Related:
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Climate change, from the hooves up
Dawn of agriculture took toll on health