Sara Imari Walker
👤 PersonAppearances Over Time
Podcast Appearances
So we take for granted survival, and therefore we take for granted that we're alive at all in some sense.
I think current estimates are that life like the oldest fossils that we can identify and like tracing back genomically about three point eight billion years ago.
So Earth, we think, you know, formed between 4.5 and 4 billion years ago.
So like 4 billion years ago, we kind of had Earth as we understand it.
Mostly now we don't know if there were oceans, but the moon forming impact had happened earlier.
Theia, I think it was called.
Just smacked into Earth and then made our moon.
Must have been really traumatic.
So I think most people think, like, life didn't happen before that because if it did, it would have been obliterated.
But we really don't know.
So, yeah, current estimates are around, you know, like 4 to 3.7, 3.8 billion years ago.
There is no consensus.