The researchers hope their latest study will help shed light on how asteroid create projectiles, and which ones pose a threat to Earth.
There are no asteroids that pose a threat to Earth.
There are, however, some asteroids that pose a threat to LIFE on Earth. Human life especially.
6 posted on 04/09/2015 10:43:56 AM PDT by Bloody Sam Roberts
(Those too smart to engage in politics are punished by being governed by those who are dumber.)