An intriguing new theory has been offered for what caused the legendary 1908 Tunguska event. Scientists studying the strange incident, in which a mysterious blast of some kind flattened a whopping 80 million trees over an area of 830 square miles in Siberia, have long suspected that it was caused by a meteor striking the Earth. However, a recently published paper reportedly calls that hypothesis into question and, instead, put forward a rather fantastic alternative explanation. See the following articles:

• Bold New Theory Offered for Source of Tunguska Blast
• Close Shave, No Impact? Bold Theory Challenges the Enigma of Tunguska Event