Actually the speed of nerve impulses is irrelevant to the whole question - which is what makes the assertion in Jurassic Park so silly. Neurotoxins affect the nervous system, but they do not travel through the body via the nervous system. They are transported from the site of injection via diffusion through surrounding tissues, and via the blood stream. In one two-thousandth of a second, a toxin, no matter how virulent, could not move more than a fraction of a millimeter from the site of injection, even if it was injected directly into an artery! Even a bite from a king cobra won't kill you in a fraction of a second! :-) Paul M.