How we know the Earth is about 4.5billion years old

There are lots of lay-folk who suspect that scientists make what amounts to ‘stabs in the dark’ when attempting to answer some of the more intriguing questions of the universe.

Like, for instance the age of the Earth.

This post is one of the best (read: concise) overviews I’ve read of why we should expect the age of the earth to be around the 4.5billion mark. It’s one of the best because it comes right out and acknoweldges the variation of conclusions, but in such a way as to explain that they would be, in fact, just what should be expected.

Anyway, have a read – it won’t take you long.


Pic above is an artist’s impression of the formation of a proto-planetary body, accreted from a disk of stellar debris. Via Wikipedia.


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