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This winter, I asked William Ailor, an asteroid specialist at The Aerospace Corporation, a think tank for the Air Force, what he thought the risk was. Ailor’s answer: a one-in-10 chance per century of a dangerous space-object strike.
Some of the biological consequences of the Tunguska event are most significant. In the epicentre there has been an accelerated growth of biomass that has endured for decades after the blast. Several biological mutations have also been recorded, not only within the epicentre itself, but also along the trajectory path of the fire-ball of light as it passed over Tunguska. Abnormalities in the Rh blood factor of the local Tungus people, the Evenks. There is also evidence suggesting genetic variations in certain local ant species, as well as genetic abnormalities in the seeds and needle clusters of at least one of the indigenous pine tree species. (11) Interestingly, other studies have revealed overmagnetized soils in several locations in and around the Tunguska site, and furthermore overmagnetized boulders have been found in the north of the Boguchanski district which is located along the presumed trajectory of the Tunguska body. (13) In some cases the intensity of the magnetization was recorded as anywhere between 10 to 100 times higher than normal levels.