№ 0009 Mystery Open Drafted by AI Starter case

What caused the Tunguska explosion of 1908?

Tunguska event

On the morning of 30 June 1908 an enormous explosion flattened forest over about 2,000 square kilometres in Siberia. No crater was ever found.

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QuestionWhat caused the Tunguska explosion of 1908?
A stony asteroid exploded in the air56%
A fragment of a comet exploded in the air30%
A release of natural gas from the Earth's crust14%
100%
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