Speeding around the Earth at 28,000 km/h, NASA astronaut Nichole Ayers captured an incredible view of a phenomenon known as a red sprite. Here's the science behind this 'transient luminous event'.

Billions of cicadas are expected to start swarming in more than a dozen states in the coming weeks, and while the strange occurrence may be a nuisance for many, scientists say the activities of the ...

Add Yahoo as a preferred source to see more of our stories on Google. Earth is a planet full of mysteries. There are so many strange yet fascinating geological phenomena that just seem impossible to ...