Residents near Krasnoyarsk Krai, Russia, were left shaken on the morning of June 30, 1908, when the ground rumbled and the windows smashed. A fireball, believed to have been up to 100-metres-wide ripped through the air above a remote forest near the Podkamennaya Tunguska river, in what is now part of Russia. The space rock depleted 770 miles of forest and wiped out almost 80 million trees.
Express.co.uk: How mystery explosion wiped-out 800-miles of Russia
Fragments of rock retrieved from a remote corner of Siberia could help to settle the enduring mystery of what exactly caused the Tunguska explosion on June 30, 1908.
