Our universe is a fascinating and awe-inspiring place.

Did you know that your hair collects dust from space,

but the universe is expanding inside your body,

or that there are diamonds everywhere?

I'm Tom Kurs, astronomer and author,

and these are just a few of the 101 fascinating topics

explained in my new astronomy book, Diamonds Everywhere.

Diamonds Everywhere,

awe-inspiring astronomy discoveries,

available from all good booksellers.

This is Scientific American's 60 Second Science.

I'm Christopher and Daljata.

How big is a helium atom?

Or maybe the better question is how small?

After an intricate game of particle jockeying,

physicists have now measured the radius of the helium nucleus,

and they've done it five times more precisely than before.

Why do that?

Well, atomic physicist Julian Kraut with the Max Planck Institute

says these sorts of measurements can help refine

our most basic ideas about how atoms work,

like the theory of quantum electrodynamics.

...