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 Engineering Tech The digital future may rely on ultrafast optical electronics and computers The author’s lab’s ultrafast optical switch in action. Mohammed Hassan, University of Arizona, CC BY-ND Mohammed Hassan, University… byMohammed HassanJuly 11, 2023