Latest
There's a black hole pointed at Earth. You're not in danger.
This might sound scary, but it's not.
By Mark Kaufman
How likely is a terrible asteroid impact in your lifetime?
Astronomers find hundreds of near-Earth asteroids every year.
By Mark Kaufman
Large spiders are rapidly spreading in the U.S. They're not after you.
It's time we become friendly neighbors.
By Mark Kaufman
