Complex life on Earth may be much older than thought - BBC

A group of scientists say they have found new evidence to back up their theory that complex life on Earth may have begun 1.5bn years earlier than thought.

The team, working in Gabon, say they discovered evidence deep within rocks showing environmental conditions for animal life 2.1bn years ago.

But they say the organisms were restricted to an inland sea, did not spread globally and eventually died out.

The ideas are a big departure from conventional thinking and not all scientists agree. https://www.bbc.com/news/articles/c3geyvpxpeyo