[anon84873628]

"900M years" is a typo, right? That's the time of the earliest sponge-like animals ever...

[defrost]

I'd hope so.

The linked article talks about the human bottle neck 900,000 years ago, that's almost a million years, but well short of 900 million.

[sillystuff]

Yeah, should have been 900K. Can't edit.