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Forest fires set up record raindrops

24 July 2004

YOU wouldn’t want these raindrops falling on your head. Measuring up to 8.8 millimetres across, making them the largest ever recorded, they were discovered in clouds over a burning rainforest in Brazil and over the Marshall Islands in the Pacific.

Typically, raindrops never grow to more than 5 millimetres across. Beyond that size they break into smaller droplets when they crash into each other, or disintegrate during free-fall.

Peter Hobbs and Arthur Rangno at the University of Washington in Seattle discovered the record-breaking raindrops when they were trawling through atmospheric data collected by their research aircraft between 1995 and 1999…

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