The mystery of the dark asteroid that scorched Russia
A new theory emerges to explain the enigmatic Tunguska Event. "The so-called 'Tunguska event' is different. It remains a mystery. After decades of scientific expeditions, no one has found a crater or any debris from a meteorite or comet — nothing to conclusively indicate a violent collision with the Earth." However, recent developments may change that. Marco Altamirano explores in Nautilus.