Tons of ice have been brought in at the Prague Zoo to help its animals beat the extreme summer heat. Polar bears Aleut and ...

Morale has plunged among doctors and nurses at Veterans Affairs hospitals across the US amid hiring freezes and fears of ...

Joby Aviation conducted the first test flight of its fully-electric air taxi in Dubai this week, a major milestone in the ...

In the atmospheric layer above it, about 10 to 30 miles up, is the stratospheric polar vortex, where every winter a sunlight-starved Arctic spins up a mass of cold air that, ultimately, dissipates ...