NASA’s Day of Remembrance remembers all fallen space heroes but specifically the crews of Apollo 1 and the space shuttles Challenger and Columbia. After each fatality, NASA said it has made ...

The trillion-ton slab of ice — called a megaberg — could slam into South Georgia Island, making it hard for penguin parents to feed their babies and some young could even starve.

A horrifying video by researchers at Princeton University simulates how a nuclear war between the US and Russia might unfold, estimating that tens of millions would perish in the first 24 hours alone.