NASA

See an ice avalanche on Mars

Photo: NASA/JPL/UA

A photo taken in May by NASA's Mars Reconnaissance Orbiter shows an avalanche of ice falling on the planet.

What they're hearing: "Every spring the sun shines on the side of the stack of layers at the North Pole of Mars known as the north polar layered deposits. The warmth destabilizes the ice and blocks break loose," NASA said in an image description.

NASA emails reveal agency's surprise at asteroid's near-miss of Earth

NASA's logo.
Photo: Space Frontiers/Getty Images

Internal NASA communications show the agency's surprise after a football-field-sized asteroid narrowly missed Earth in July, according to emails acquired by BuzzFeed News via a Freedom of Information Act request.

Why it matters: The emails show that NASA officials believe the agency is lacking necessary infrastructure to reliably detect asteroids.