How can scientists claim something is dated back millions of years?

Question

It seems really farfetched to me, are we counting fossil rings or something?

In: Chemistry

Answer 1

For learning about climate related events, ye, pretty much.

Not on fossils, but on pieces of ice. We can 3xtract really long columns of from the Arctic and Antarctic and look at the layers formed because ice melted when it was warmer and has a different texture. So you can tell stuff like lengths of seasons and stuff like that a really long time ago.