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 6 minute read Earth How science saved the ozone layer Concentration of ozone (in Dobson units) as of mid-September 2022, based on measurements by the IASI infrared sounder… byCathy ClerbauxJanuary 8, 2024