Isaac Newton Meet Terra

According to this report by Sandia National Laboratory, the Tunguska Explosion was caused by a small meteorite. The report suggests that in the future we need to pay attention to this kind of possible strike, instead of concentrating on the big ones. I guess M=V2 applies, but the meteorite would have to be of a very dense matter to survive entry into the Earth's atmosphere. Maybe if it was a chunk of Larry Niven's Neutron Star. See this report Sandia supercomputers offer new explanation of Tunguska disaster