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It would be reasonable to hear the term “volcanic bomb” and presuppose that such an object tends to explode.

But a specific type of volcanic bomb rarely lives up to the second half of its name: These objects get blasted into the air, crash into the ground and disappointingly fail to detonate.

They can't calculate the trajectory of every volcanic bomb.

The same force that would throw a volcanic bomb a mile high on the earth could throw it six miles high on the moon.