Small numbers


This ammonite fossil is 170 million years old.

That’s a hard number to grasp, so let’s put it in context.

It’s just over 2000 years since we switched from BC to AD. For us, 2000 years ago is ancient history.

But 2000 years are nothing to this little fossil. What proportion of his existence do those 2000 years represent?

Not much: he is so old that the entire AD era – starting when the Romans ruled Britain, Augustus was on the throne, and Jesus was born – is only 0.00001% of his time on Earth.

What do you think?

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