Slippery eel slides towards disaster

Cupping a tiny, translucent eel in the palm of his hand, New York environmental researcher Chris Bowser shook his head in amazement. "This is worth about one dollar," he said.

May 11, 2013 4.5 / 5 (2) 0

Cheating favors extinction

Cooperative behaviour is widely observed in nature, but there remains the possibility that so-called 'cheaters' can exploit the system, taking without giving, with uncertain consequences for the social unit ...

Apr 30, 2013 4.1 / 5 (16) 70 | with audio podcast