quiz:103
What mysterious explosion flattened 80 million trees in Siberia in 1908?
At 07:17 a.m. on 30 June 1908, a blinding fireball streaked over the Stony Tunguska River. Seconds later, a mid-air explosion—now estimated at up to 50 megatons, 1 000× Hiroshima—flattened 80 million trees in a radial pattern visible from space. Shockwaves rattled windows in Moscow and