Extraterrestrial microbes might have brought life to Earth after travelling through space for millions of years, say scientists.
The theory is based on calculations showing a high likelihood of rock fragments from planets in other star systems landing on Earth long ago.
Some of them could have carried embedded micro-organisms, according to experts writing in the journal Astrobiology.
This is actually old news. Astronomer, Sir Fred Hoyle, postulated this idea years ago. To read more, click here.