Antarctic winds create snowball 'tumbleweeds'
Researchers with the European Space Agency have captured frozen versions of desert 'tumbleweeds' in Antarctica. Frost layers on snow are broken up by winds packing the ice crystals together into frost balls, which are tossed throughout the Antarctic like tumbleweeds. The 'yukimarimo' phenomenon was discovered by Japanese researchers in 1995 â yuki meaning 'snow' and marimo 'moss balls'. 