Is every species necessary or can we let some die out?
Technology

Is every species necessary or can we let some die out?

A white rhinoceros foraging in Lake Nakuru National Park, Kenya Kiko Alvarez / Alamy The following is an extract from our nature newsletter Wild Wild Life. Sign up to receive it for free in your inbox every month. There are many organisms teetering on the brink of extinction. Take the planet’s smallest marine mammals, vaquitas (Phocoena sinus), […]

Graviton: We've glimpsed something that behaves like a particle of gravity
Technology

Graviton: We’ve glimpsed something that behaves like a particle of gravity

Have we spotted hints of gravitons? zf L/Getty Images Physicists have been searching for gravitons, the hypothetical particles thought to carry gravity, for decades. These have never been detected in space, but graviton-like particles have now been seen in a semiconductor. Using these to understand gravitons’ behaviour could help unite the general theory of relativity […]