Where did turtles come from? And how did the they get their shells? The answers to these questions caused scientists to rethink the entire history of reptile evolution.
This Juno spacecraft image, taken February 7, 2018, captures a close-up view of a storm with bright cloud tops in planet Jupiter's northern hemisphere.
NASA's Parker Solar Probe, launching this summer, will travel closer to the sun than any spacecraft yet - and you can send your name along for the ride. Hear about it from William Shatner.
Eleanor Imster has helped write and edit EarthSky since 1995. She was an integral part of the award-winning EarthSky radio series almost since it began until it ended in 2013. She and her husband live in Tennessee, where they enjoy guitar playing and singing. They have 2 grown sons.