Three Earth-like planets
Serge Bloch for Reader's Digest
Astronomers found not just one but seven planets outside our solar system that circle a tiny star called TRAPPIST-1, about 40 light-years away. Three are in what NASA calls the habitable zone, which could be right for water to exist and possibly for extraterrestrial life. Think you know all there is to know about earth now? Take this quiz to find out.
Shrimp so loud, they were named after a rock band
On the Pacific coast of Panama, scientists discovered a new type of pistol shrimp that uses its large pink claw to create a noise so loud it can stun—or even kill—small fish. In fact, the boom created by the animal’s snapping claw can reach 210 decibels. For comparison, a loud concert is about 110 to 140 decibels. (Humans can lose their hearing from loud concerts and even loud cities.) The team members dubbed it Synalpheus pinkfloydi, inspired by their love of Pink Floyd.