Leap seconds have helped keep clocks synchronized with Earth’s rotation, but their time is now over – here’s why
300 glaciers have disappeared from the American West since the mid‑20th century – the survivors have a few things in common
Read More 4 minute read Math and the Sciences Space How could we detect atom-sized primordial black holes? Artist’s rendition of a concentration of small black holes in the centre of the galaxy NGC 6397. ESA/Hubble,… byOscar de Barco NovilloFebruary 27, 2023