What's up with these sun-diving comets?

Catch up with NBC News Clone on today's hot topic: Whats These Sun Diving Comets Flna653446 - Breaking News | NBC News Clone. Our editorial team reformatted this story for clarity and speed.

April 4, 2012, 12:11 PM EDT

By msnbc.com technology & science

Scientists want to know why some 'supersonic snowballs in hell' fizzle and others explode

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