A new drone service is delivering supplies such as ladders and oxygen cylinders on Mount Everest, making it safer for Sherpas and cutting the time it takes to get supplies up the mountain – as well as ...

Milan Pandey is sitting back down at Everest Base Camp, looking out over views that few have ever seen — and he got there ...

Warm air rises, but it also expands because air pressure decreases with height. The latter effect wins out and air becomes ...