- What happened?
- When?
- Where?
- Who investigated it first?
- What did the scientists find out later?
- Can we explain the mystery now?
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-Huge fireball falled and then exploded.
-On 30 June,1908
-The explosion happened in Sibiria,in a place called Tunguska.
-Leonid Kulik
-The scientists find shock wave in different places around the world.
-There are no answers yet.