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Molecular biology fills gaps in knowledge of bat evolution

...f mammals on earth and the only mammals capable of powered flight. The fossil record alone left bat evolutionary history about 61 percent incomplete, according to Springer. Bats play a major ecological role as plant pollinators and insect predators. For Springer, this latest research is significant because ...

DNA Recombination and Repair—A New Twist to RecA Function

...the march of white blood cells toward pathogens is powered by the growth of actin filaments pushing against the cells?membranes. In all cases, coherent motion implies a coordinated and polarized use of energy. Now, Julia Cox, Oleg Tsodikov, and Michael Cox present evidence indicating that filaments of the b...

Scientists journey to southern Africa to unravel the secret world of elephant communication

...ed with laptops, cameras, cables and recorders and powered by solar energy. "Elephants have generally been coming to the waterhole between noon and midnight, so all the cooking and major noise in the camp has to be done by 2 p.m.," O'Connell-Rodwell notes. Peering through binoculars, she and Eckert finally...

Butterfly migration could be largest known

...orth in search of fresh food and breeding grounds, powered by a supply of yellow fat they have built up over the winter. Painted ladies migrate every year, but usually less conspicuously and in far fewer numbers. This year, however, exceptionally high winter rainfall in southern California has created a bum...

Wright bros. upstaged! Dinos invented biplanes

..., Pedopenna, he said. Archaeopteryx achieved fully powered flight with monoplane configuration, as its wing b...stay aloft longer by gliding, and finally acquired powered flight. As those abilities developed, feathers became larger and more specialized, providing greate...

Tsunami + 1 year: Reviving exhausted fisheries should trump replacing boats, gear, experts say

...-scale fishers using low-technology gear and small powered and un-powered vessels. Since the tsunami, significant infrastructure and equipment replacement efforts have been launched, upgrading catch capacity. The WorldFish Centre warns, however, that the area's fisheries are "severely depleted" ?and were...

A new focus for the mechanism of nerve growth

... assembled at the leading edge and moved rearward, powered by a myosin II motor located at its back end. But, the networks making up this actin treadmill are constantly being recycled at the back end, and actin molecules are freed to complete a "virtual belt" cycle and be used again. "Surprisingly, growth ...

Georgia Tech accelerates drug discovery with new IBM supercomputing cluster

... 1350 system built on IBM BladeCenter® systems and powered by dual-core AMD Opteron TM processors is capable of performing more than 8.5 trillion calculations per second, which would place it as the world's 41st most powerful supercomputer based upon the November 2005 TOP500 list (www.top500.org) of superco...

Protowings may have helped bird ancestors cover rough terrain

...l birds to be terrestrial dinosaurs that developed powered flight from the ground up. An article by Kenneth P. Dial and two co-authors in the May 2006 issue of BioScience summarizes experimental evidence indicating that ancestral protobirds incapable of flight could have used their protowings to improve hin...

Five new technologies that promise to transform medicine

... with degenerative eye disease. The telescopes are powered by sunlight passing through the pupils to microscopic solar battery panels attached to the retinas. These scenarios illustrate potential clinical applications of technologies currently under development, says Professor Combs. For instance, devices...

New system could drastically reduce herbicide use

...nd continuously collect data, but the battery that powered the system required charging about every two hours. "So I thought, what if we had a system that could collect data, but could also convert the heat of the sun into an energy source?" said Tian. "We could replace the grad student worker with this r...

Ethanol vehicles pose a significant risk to human health, study finds

...nited States) fueled by gasoline, versus A fleet powered by E85, a popular blend of 85 percent ethanol and 15 percent gasoline. Deaths and hospitalizations The results of the computer simulations were striking. ''We found that E85 vehicles reduce atmospheric levels of two carcinogens, benzene ...

Fitness has fallen since the days of Ancient Greece

...ruction of an Athenian trireme, a 37m long warship powered by 170 rowers seated in three tiers. Using portable metabolic analysers, he measured the energy consumption of a sample of the athletes powering the ship over a range of different speeds to estimate the efficiency of the human engine of the warship. ...

Diminishing dinosaur steps saved by laser and laptop

...eropod dinosaurs. The portable system, which is powered by a battery, works by rotating and firing laser beams, which reflect off the quarry faces back to a receiver. The device then cross references the reflections with a built-in digital camera and GPS, and feeds the information into an attached laptop....

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