How to pronounce“billion year old”in English

and the odds are in a 10 billion year old Galaxy that anyone else's technology

- Just because I have a 4 billion year old history, why does that mean I can't hang out with aliens?

You're talking about 4 billion year old record that is ever changing.

So if you think about you as a 4 billion year old object, the things that are a part of you, like your capacity use language or think abstractly

Astronomers make jokes whenever we drink water that we are drinking 13.8 billion year old water.

There's not that many places where you can walk on a 2 billion year old rock.

So, you're looking at a 3.8 billion year old mechanism.

The other, that Mother Gaia is a 4.5 billion year old library and blueprint of a highly functional and sustainable technology.

and the child is actually not a blank slate, but the result of one of the most incredible several billion year old computations

We think it evolved around 2.7, maybe roughly three, probably less than 3 billion year old, billion years ago.