Exhibit A: A pretty convincing case for alien life, don't you think? Image credit: University of Sheffield British researchers say they've found extraterrestrial life, and they've got the microscopic pictures to prove it. During a recent meteor shower, the scientists sent a balloon up into the stratosphere 16 miles above the Earth's surface and it came back with pieces of diatoms (a type of single-celled algae). Are they alive? Probably not. But do they have DNA? Looks like it! Because the organisms were retrieved from so incredibly high up, the researchers believe they had to have come from elsewhere in the cosmos. One of the researchers, Milton Wainwright, told the Independent: