Scott Pruitt says there's no proof that carbon dioxide pollution is causing the Earth to heat up. Well-established science — and a scientist who's a fellow Republican — says that's flat-out wrong.
He's helping to uncover the origins of the universe with a massive antenna so sensitive it detected faint invisible ripples in space from 1.3 billion years ago.
When he was 19, Mark Everett’s father died. But his big idea, a surprising interpretation of quantum mechanics, lived on. And if that idea is right, he might still be alive … somewhere.
For decades, astronauts have had to drink from plastic bags to keep their water and coffee from floating away. Now NASA is trying out a new "zero-gravity cup" that uses physics to simulate taking a normal sip back on the ground.