In the Aug. 19 SN: Bulletins from the tick wars, roots of Rwandan genocide, spin-resistant spiders, making mums blue, tardigrade saga continues, HIV antibodies from cows, Maxwell’s demon aces memory test and more.
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.
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.
Culture and Development Lab/Osnabrück Univ.
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.