In 1908, a huge explosion knocked down trees near Tunguska, in Siberia. But investigators found no giant crater—a hole left by something hitting the ground.
mystery
In 1908, a huge explosion knocked down trees near Tunguska, in Siberia. But investigators found no giant crater—a hole left by something hitting the ground.
The rest of this one is in Curio Pro.
Source: nasa.gov
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