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 Health and Body Wildfire smoke is an increasing threat to Canadians’ health Ryan W. Allen, Simon Fraser University and Stephanie Cleland, Simon Fraser University Air quality in Canada has improved… byRyan AllenSeptember 21, 2023