Researchers studying the movement of crowds at a traditional Spanish festival have shown that densely packed groups of people form swirling ‘vortex ... fluid made up of particles (most ...

Antarctic sea ice drops to 'alarming low' for the third year in a row A massive vortex of ocean water encircling Antarctica, a swirling volume 100-times larger than all the world's rivers combined ...

The polar vortex, a swirling mass of cold air located over ... wind chill values to dip into the -5 to -15 range even with a light breeze. Wednesday will only see a slight gain in temperatures ...