Post Thumb

Ultrafast Camera Captures 'Sonic Booms' of Light for First Time

Just as aircraft flying at supersonic speeds create cone-shaped sonic booms, pulses of light can leave behind cone-shaped wakes of light. Now, a superfast camera has captured the first-ever video of these events.

Post Thumb

You Can't Travel Back in Time, Scientists Say

Dashing the hopes of anyone who wants to be their own grandpa, some theorists now say this darling of science fiction just isn't possible.

Post Thumb

You Can’t Travel Back in Time, Scientists Say

Dashing the hopes of anyone who wants to be their own grandpa, some theorists now say this darling of science fiction just isn't possible.

Post Thumb

Ancient Asteroid Destroyer Finally Found, And It's a New Kind of Meteorite

A strange meteorite from Sweden that resembles winonaites is a new kind of space rock never before seen on Earth.

Post Thumb

Ancient Asteroid Destroyer Finally Found, And It’s a New Kind of Meteorite

A strange meteorite from Sweden that resembles winonaites is a new kind of space rock never before seen on Earth.