Archive: 29/03/2010

Hyenas' laughter signals deciphered

Acoustic analysis of the 'giggle' sound made by spotted hyenas has revealed that the animals' laughter encodes information about age, dominance and identity. Researchers writing in the open access journal BMC Ecology recorded ...

dateMar 29, 2010 in Plants & Animals
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How immune cells 'sniff out' bacteria

Scientists are learning how our immune system senses and tracks down infection in the body by responding to chemical "scents" emitted by bacteria. Studying how immune cells manipulate their movement in response to external ...

dateMar 29, 2010 in Medical research
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An Avalanche of Asteroids

Imagine you're a Brontosaurus with your face in a prehistoric tree top, munching on fresh leaves. Your relatives have ruled planet Earth for more than 150 million years. Huge and strong, you feel invincible.

dateMar 29, 2010 in Space Exploration
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