Tech: Tunguska asteroid smaller than once thought

[dracodraconis]

A new supercomputer model indicates that the Tunguska disaster may have been caused by an asteroid significantly smaller than originally thought. The devastation, covering an area the size of Tokyo, was thought to be caused by the mid-air detonation of an asteroid 30 metres wide with 10 times the mass of the Titanic. The new simulation indicates that the asteroid only had to be one-quarter that size. This result has implications for the people tracking asteroids; there are many more objects of this size sweeping close to the earth.