Imagine walking across your field, picking up rocks like you've done a thousand times before, when suddenly you're holding a piece of space itself. Maybe it's been sitting there for centuries.Or maybe ...

The Sotheby’s auction for meteorite NWA 16788, the largest chunk of Mars found on Earth, started at $2 million. While Sotheby’s expected it to go for between $2 and $4 million, a 15-minute bidding war ...