When planes fly from east to west, they are flying against a river of air called a jet stream. These air currents can make your flight longer or shorter, depending on which way you are going.

Ice Age glaciers can help us track the jet stream 12,000 ago, and by comparing its path today we can see how it's moving northwards, changing weather patterns and indicating climate change.

Sudden warming more than 10 km above the north pole can mean sudden freezing down here.

A recent US study found tyre chemicals were polluting rivers and poisoning migratory salmon.

Since 1979, the average number of snow days has fallen by about five per decade.

Last week, much of the Midwest and eastern US experienced hazy skies and red sunsets. The cause was smoke transported from the Western US by the jet stream and spread as far as Boston and even Europe.

Giant balloons that beam the internet from the stratosphere reveal a new insight into gravity waves. The research could improve weather forecasts.

A new standard for how videos are sent through the internet and read by your computer could make the digital world more inclusive, says media scholar Jason Schmitt.

"The high elevation zone you love to hike around in, and streams that you love to go fishing in, and places that you look to as your refuge for solace are changing."

"Fire not being influenced by moisture anymore? That is surprising. It's going to be a problem for people, for firefighters, for society."