Mystery alien rock unearthed in Swedish quarry

Piece of meteorite may have resulted form a mid-space collision between vast asteroids more than 470m years ago

A morsel of never-before-seen alien rock has been dug up in a limestone quarry in Sweden, where it had lain deeply buried for about 470m years, scientists said on Tuesday.

The biscuit-sized remains are unlike any other meteorite found on Earth to date, and may shed light on the history and formation of our solar system, they reported in the journal Nature Communications.