Ghost stories have been around as long as there have been stories themselves. The idea of apparitions from the spirit world goes back to the very beginnings of written history, and probably even ...

Ghost Riders in the Sky is what Firefly Aerospace and NASA are calling a mission set to launch to the moon this week, delivering 10 science and technology instruments onto the lunar surface. Firefly's ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. The Blue Ghost ...

Four years ago, a green “ghost” appeared over a thunderstorm cloud in the Mediterranean Sea. To the delight of Spanish scientists, this ephemeral sighting finally offered a rare window into a ...