The Great Ape Dictionary asks: Can you tell if chimpanzees are related by looking at their photos? The history of the pom-pom, that “small burst of fun” on top of our hats. Astronomy fans, mark your calendars for these space events of 2018. And on topic, too: NYC officials hunted down food-poisoning outbreaks using Yelp.
Photo: Pom-poms atop hand-knitted doll hats. (Susan Tripp Pollard/Bay Area News Group archives)