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 Earth New world map makes Africa look bigger: what’s the fuss about? Cartographers explain Jack Swab, University of Tennessee and Derek H. Alderman, University of Tennessee The UN has passed a non-binding… byJack SwabSeptember 23, 2026