LUCA, short for Last Universal Common Ancestor, is believed to be the single-celled organism from which all life on Earth descended. Estimated to have existed around 4.2 billion years ago, LUCA is ...

Researchers bombarded lichens with a year's worth of Martian radiation in just 5 hours — and they survived, hinting that the ...

All bacteria exist as single cells at some point in their lives – except for one kind, known as multicellular magnetotactic ...