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6 March 2014 1:04 pm ,
Vol. 343 ,
Magdalena Koziol, a former postdoc at Yale University, was the victim of scientific sabotage. Now, she is suing the...
Antiretroviral drugs can protect people from becoming infected by HIV. But so-called pre-exposure prophylaxis, or PrEP...
Two studies show that eating a diet low in protein and high in carbohydrates is linked to a longer, healthier life, and...
Considered an icon of conservation science, researchers at World Wildlife Fund (WWF) headquarters in Washington, D.C.,...
The new atlas, which shows the distribution of important trace metals and other substances, is the first product of...
Early in April, the first of a fleet of environmental monitoring satellites will lift off from Europe's spaceport in...
Since 2000, U.S. government health research agencies have spent almost $1 billion on an effort to churn out thousands...
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ScienceShot: How Bats Deal With Clutter
29 March 2010 4:34 pm
Bats navigate by bouncing their calls off every object that surrounds them, a behavior known as echolocation. But how do they keep things straight when several of these calls echo back at once? To find out, researchers trained big brown bats (Eptesicus fuscus) to fly through a dense maze of dangling plastic chains, then suddenly altered the maze path. Recordings from microphones placed on the bats' heads showed that the bats rapidly shifted the pitches of their calls up and down when navigating this new maze, allowing them to discriminate between multiple arriving echoes. It's as if the bats assign acoustic nametags to each call, the team reports online today in the Proceedings of the National Academy of Sciences. The findings might also apply to other animals who echolocate, such as whales and dolphins, further revealing how these animals' brains make sense of the noisy world around them.