Humans aren't alone in giving gifts
Wednesday, December 24, 2008 - 09:07
in Psychology & Sociology
At Christmas time, we usually expect presents in return for the gifts we give out. And now it seems we humans aren't alone in this calculating attitude. New research published in the Royal Society journal Biology Letters, has shown for the first time that non-humans also keep tabs on the gifts they give, and expect something back in return...