The polar vortex is a broad, fast ribbon of cold air that encapsulates the Arctic high in the stratosphere. Stable, it confines cold air near the North Pole. Unstable, it is rocked and stretched out ...

Earth's atmosphere is heavy, so why doesn't it weigh us down more? When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Miles of air cover Earth. The ...

Their pioneering work also made it possible to estimate, for the first time, the quantity of pesticides found in all low and medium clouds in mainland France, ranging from 6 to 139 tonnes. A look back ...