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From a Few Bones, the Most Primitive Snake Emerges

Researchers at Yale have identified an ancient slithering creature from the time of T. rex as the most primitive known snake, a finding with implications for the debate over snake origins.

“It’s the missing-link snake,” said Nicholas Longrich, a postdoctoral fellow in Yale’s Department of Geology & Geophysics and the lead author of a paper about the lizard-like snake published July 25 online in the journal Nature. “It’s the ‘Lucy’ of snakes.”

The paper argues that snakes descend from terrestrial rather than marine ancestors, as recently proposed by others, and that snakes emerged once lizards developed long, limbless bodies for burrowing. (more…)

Photovoltaics from Any Semiconductor

Berkeley Lab Technology Could Open Door to More Widespread Solar Energy Devices

A technology that would enable low-cost, high efficiency solar cells to be made from virtually any semiconductor material has been developed by researchers with the U.S. Department of Energy (DOE)’s Lawrence Berkeley National Laboratory (Berkeley Lab) and the University of California (UC) Berkeley. This technology opens the door to the use of plentiful, relatively inexpensive semiconductors, such as the promising metal oxides, sulfides and phosphides, that have been considered unsuitable for solar cells because it is so difficult to tailor their properties by chemical means. (more…)

Underwater Ecosystem Inundated by Sediment Plume

Dive Teams Continue Underwater Study at Mouth of Elwha River

PORT ANGELES, Wash. — Scuba-diver scientists from the U.S. Geological Survey, with support teams from the U.S. Environmental Protection Agency, the Lower Elwha Klallam Tribe, and Washington Sea Grant, are returning to the mouth of Washington’s Elwha River this week to explore and catalogue the effect of released sediment on marine life following the nation’s largest dam removal effort.

The underwater survey is taking place downstream of the Elwha and Glines Canyon Dams, which are nearing the one-year anniversary of the start of their removal, a gradual process that officials expect to be finished in 2013. The dive survey is helping scientists understand how underwater plant and animal life react and adapt to the downstream effects of dam removal and providing scientists a more detailed and complete picture of the ecological restoration. (more…)

Bird in the Hand

University art conservation student prepares Blue Hen for display

When University of Delaware Prof. Jack Gelb, Jr., was given a taxidermy specimen of a Blue Hen by a retiring colleague in the Department of Animal and Food Sciences, he realized that this particular example of the Delaware state bird was somewhat the worse for wear.

And so Gelb, who is chairperson of the department as well as director of UD’s Avian Bioscience Center, turned to the Department of Art Conservation for expert help.

“This was a wonderful opportunity for me to learn about natural history materials,” said Elena Torok, now a third-year graduate student in the Winterthur-University of Delaware Program in Art Conservation. “We happily agreed to work” on the project. (more…)

Global Expansion All About Give And Take, Study Finds

EAST LANSING, Mich. — The key to successful global business expansion is spreading operations across multiple countries, rather than trying to dominate a region or market, according to a new study led by Michigan State University researchers.

In addition, since global expansion is costly for service industries, manufacturing industries will profit most, said Tomas Hult, director of MSU’s International Business Center.

Led by Hult and Ahmet Kirca, associate professor of marketing, the study is the largest ever conducted to examine the effect of multinationality on firm performance, Hult said. It incorporates data from nearly 48,000 firms. (more…)

Entropy Can Lead to Order, Paving The Route to Nanostructures

ANN ARBOR, Mich.— Researchers trying to herd tiny particles into useful ordered formations have found an unlikely ally: entropy, a tendency generally described as “disorder.”

Computer simulations by University of Michigan scientists and engineers show that the property can nudge particles to form organized structures. By analyzing the shapes of the particles beforehand, they can even predict what kinds of structures will form.

The findings, published in this week’s edition of Science, help lay the ground rules for making designer materials with wild capabilities such as shape-shifting skins to camouflage a vehicle or optimize its aerodynamics. (more…)

Some Harmful Effects of Light at Night Can Be Reversed, Study Finds

COLUMBUS, Ohio – Chronic exposure to dim light at night can lead to depressive symptoms in rodents – but these negative effects can be reversed simply by returning to a standard light-dark cycle, a new study suggests.

While hamsters exposed to light at night for four weeks showed evidence of depressive symptoms, those symptoms essentially disappeared after about two weeks if they returned to normal lighting conditions.

Even changes in the brain that occurred after hamsters lived with chronic light at night reversed themselves after returning to a more normal light cycle. (more…)

Terrorism and the Olympics By-the-Numbers: Analysis from UMD-based START

COLLEGE PARK, Md. – History offers a warning, but no clear pattern on the true risk of terrorism at the Olympic Games, concludes a new report by the National Consortium for the Study of Terrorism and Responses to Terrorism (START) based at the University of Maryland. (more…)