PRE-HISTORIC SCIENCE - Is there a connection between hot weather and violence? And, were our ancestors really as warlike as we make them out to be? Also, did ancient Egyptians jewelry have extraterrestrial origins? And, were spices part of ancient European cuisine?
BRAINS & BEHAVIOR - When apes take a gamble. The value of precision in negotiations. And a new approach to targeting drug addiction in the brain. Also: what above-ground nuclear tests in the mid-20th century can tell scientists about the brain.
WATER EVERYWHERE - Astronomers have discovered the largest cache of water ever, and researchers are developing new software for detecting contamination of municipal water supplies. Also: Round robots to help safeguard nuclear power plants.