Study suggests rats smile with their ears

(—A team of researchers with the University of Bern in Switzerland has found that as part of feeling happiness, rats undergo a slight physical change. As the team notes in their paper uploaded to the peer-reviewed ...

Power of shared pain triggers extreme self-sacrifice

The extreme self-sacrificial behavior found in suicide bombers and soldiers presents an evolutionary puzzle: how can a trait that calls for an individual to make the ultimate sacrifice, especially in defense of a group of ...

Risk aversion as a survival strategy in ants

Ants are excellent navigators and always find their way back to the nest. But how do they react when an obstacle or a predator blocks their path?

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