universe

How The Universe Ends

How The Universe Ends

Somewhere between a second and a millennium from now, you will die. Your body and all of its parts will cease functioning and rejoin the Earth as regular, lifeless stuff. The Earth, too, will die, engulfed by an expanding, ageing Sun. The Sun will burn off all of its fuel…

What Is The Speed Of Dark Matter?

What Is The Speed Of Dark Matter?

Based on physicists’ measurements, most of the mass in the universe is actually taken up by dark matter. Whatever this stuff is, we can see its effects on the behaviour of distant galaxies, though no experiment has detected it here on Earth. Doing so probably requires knowing how fast it…