Mysterious Ice Balls Falling from Heavens [Dec 11]

‘Great balls of ice that fall out of the clear blue sky - possibly because of global warming. Most weigh 25 to 35 pounds, but one whopper found in Brazil tipped the scales at 440 pounds. Ice balls have punched holes in the roofs of houses, smashed through car windshields and whizzed right past people's heads. Research on megacryometeors in January 2000, after ice chunks weighing up to 6.6 pounds rained on Spain out of cloudless skies for 10 days. Lab tests showed that ice in megacryometeors had the distinctive chemical signature of ice in ordinary terrestrial hailstones. That leaves monster hailstones forming in a cloudless sky, a notion that defies more than a century of research on hail formation.’