Behaviour study shows rats know how to repay kindness

If I scratch your back and you scratch mine, then we're both better off as a result – so goes the principle of reciprocity, one of the most popular explanations for how co-operative behaviour has evolved. But what if one ...

Anthropologists study the genesis of reciprocity in food sharing

When you share your lunch with someone less fortunate or give your friend half of your dessert, does that act of generosity flow from the milk of human kindness, or is it a subconscious strategy to assure reciprocity should ...

Cultural products have evolutionary roots

From Brad Pitt fighting zombies to Superman falling for Lois Lane, summer blockbuster season is upon us. But while Hollywood keeps trotting out new movies for the masses, plotlines barely change.

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