Orcas found to kill blue whales, the largest animals on Earth, for first time

The Universe Is Expanding Faster Than It Should Be

To regrow forests the U.S. needs billions of seeds–and many more 'seed hunters'

Alien hunters have spent 60 years finding new solutions for the Drake Equation

At Long Last, the World's Most Powerful Space Telescope is Ready To Launch

At long last, the world's most powerful space telescope is ready to launch

A deadly disease is wiping out coral in Florida and the Caribbean

Lemurs sing in a rhythm previously only found in humans and birds

Fierce 'hell heron' dinosaur puts new wrinkles in Spinosaurus origin story

'Historic moment': Why the WHO endorsed the first malaria vaccine