Here's a 2-minute video on the comet's October 19 near-miss of Mars, and how orbiting spacecraft will evade onslaught of dust particles from the comet.
Four urban sections of the San Andreas Fault system in Northern California have stored enough energy to produce major earthquakes, according to a new study.
Tunnels ending in light, your life flashing before you, out-of-body sensations. Near-death experiences merit further study without prejudice, these researchers say.
Last volcanic activity on moon thought to be a billion years ago. Now small lava flows on moon’s dark plains suggest activity as recently as 50 million years ago.
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.