The Vietnamese military is investigating the discovery of three large metal spheres that mysteriously fell from the sky in the north of the country. Local residents reported hearing what sounded like thunder several minutes before the objects crashed to earth. One sphere was found in a stream while another had its fall broken by the roof of a house before falling to the floor.
The discovery has sparked numerous bizarre theories as to what the balls could be, although experts think they are almost certainly space objects β either from a rocket or satellite that would normally have burnt up when they re-entered the atmosphere, or otherwise from a failed satellite launch.
It is not known what has led the Vietnamese to believe the objects are of Russian-origin , but the BBC said it is possible the objects β which appear largely undamaged other than a light charring - were sold to a third nation before being launched into space.
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