Tunguska Revisited: A Smaller Asteroid Did It?
On June 30, 1908 a stunning explosion rocked the forest near the Tunguska river in Siberia. Estimates were that an asteroid exploded in the air a few kilometers above the earth's surface with a force 1,000 times that of the Hiroshima atomic bomb.
A new Sandia supercomputer simulations suggests that the asteroid that caused such a blast was much smaller than previously thought, bringing new concerns; there are more small asteroids than large ones.
“The asteroid that caused the extensive damage was much smaller than we had thought,” says Sandia principal investigator Mark Boslough of the…