September 2, 2026 — 12:01am

Save

You have reached your maximum number of saved items.

Remove items from your saved list to add more.

A A A

Examine, a free newsletter covering science, is sent every Tuesday. You’re reading an excerpt – sign up to get the whole newsletter in your inbox .

Sometimes it feels as if all the fundamental questions about existence have been solved. Then you remember dark matter.

This unknowable substance constitutes as much as 85 per cent of all mass in the universe, and yet we cannot see or directly measure it, and we don’t know what it’s made of.

But the structure of spiralling galaxies, the make-up of the cosmos, and…

Read the full article at SMH.COM.AU