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Photographs of Rwandans killed in 1994 genocide

DUTY BOUND KILLINGS  Part of the Kigali Genocide Memorial, these photographs of Rwandans killed in a 1994 mass slaughter put human faces on an unimaginable tragedy. Many factors other than obedience to authorities drove some Rwandans to kill others.

kid looking at marshmallow

WAIT FOR IT  A 4-year-old boy from a Nso farming community in Cameroon faces down a puff-puff pastry while waiting for a second treat during a battle of self-control known as the marshmallow test.


Can behaviors really be contagious? Runners log more miles when their friends do — especially if they want to stay leader of the pack, a new study finds.

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