But the universe is known to contain billions of inhabitable planets.

- How do we navigate massive visual collections which may contain billions of images?

A typical galaxy contains hundreds of billions of stars.

A pulse may contain billions or trillions of tiny peaks and troughs.

That's very small, yet still contains billions of atoms.

Although each domain contains billions of atoms, they are very small, about 10 micrometres across.

He reflects that the meteor contains billions of years' worth of space secrets.

It contained billions of brains which voluntarily had renounced their bodies.

Even seemingly clean air contains billions of germs, and deadly bacteria often have harmless relatives.

It once contained billions of dollars from those taxes.