Earth & Space

Remembering the Challenger disaster, 25 years later.

A normal, cyclical change in continental air pressure gradients has the world turned upside-down.

The godlike vision granted by our far-flung sensors.

In a lodge in the shadow of New Hampshire's Mount Washington, reading tales of the summit's almost-implausibly calamitous past.

Space race historian David Portree outlines the choices astronauts stranded in lunar orbit would have faced. Spoiler Alert: none of them are very good.

Clawing open the Earth in tilt-shift imagery, set to droning industrial tones. It's more entertaining than it sounds! Video after the jump.

A justly celebrated viral video celebrates Carl Sagan's hopes for the future of humankind�a good bet, but by no means a sure one. Video after the jump.

A picture of the instruments arrayed in the IceCube Neutrino Observatory, which was completed in Antarctica at the end of last year, only hints at the massive scale of the science involved.

"Imagination... must not be underestimated as a valuable means to advance knowledge towards new frontiers," say the authors of a new study on the possible consequences of the discovery of extraterrestrial life; we couldn't agree more.

Scientists using NASA's orbital Fermi Gamma-ray Telescope find gamma rays and antimatter streaming out of thunderstorms into Earth's upper atmosphere.