There's a giant rock ahead.

More than 15 years after fast radio bursts were discovered, new research has both unraveled and deepened the mystery of the sources of these deep space phenomena.

The NASA Double Asteroid Redirection Test aims to make history on Monday at 7:14 p.m. ET when it slams into Dimorphos, a tiny asteroid moon orbiting the larger asteroid Didymos. The impact, if successful, will slightly change the motion of the asteroid.

As soon as Dr. Mae Winchester did an ultrasound on Tara George, she knew that her baby was in trouble.

It's a hard-fought paleontological debate. Did the massive asteroid that struck Earth 66 million years ago wipe out a thriving and diverse population of dinosaurs, or were they already struggling to survive when that cataclysmic day dawned?

More people are surviving cancer than ever before in the United States, according to a new report from the American Association for Cancer Research.

President Joe Biden lit a firestorm of controversy this week when he said in an interview that "the pandemic is over": Is it really over? How do we know? Who gets to decide?