On Earth there is no record of Niallia tiangongensis, a bacterium found aboard the Tiangong station that appears to be well adapted to conditions there.

These aren't the first bacteria to be discovered in space but they are particularly well-adapted for space station life.

Swabs from China's Tiangong space station reveal traces of a bacterium unseen on Earth, with characteristics that may help it function under stressful environmental conditions hundreds of kilometers above the planet's surface.