Key points from article :
A nanoweapon deployed aboard an insect robot could be delivered just about anywhere.
Compared to the 50,000 to 1 chance of being wipe out be an asteroid strike, physicists calculate chance of destruction by nanobots at 20 to 1.
If millions of “smart” nanobots were lost or were free of controlling restraints, they could become an indiscriminate killing force.
