Zombie Evolution

Via Jon, a fascinating article about zombie evolutionary epidemiology. It discussed dispersion of fast and slow zombies. Money quote:

Zombies actually evolve towards a very diverse population, with some zombies very fast and some very slow even if the majority is optimal. This might be relevant as the situation changes. If there are many people around the optimal efficiency is lower than 0.5, since each zombie still has plenty of chances of attacking someone. After most people have turned to zombies fast zombies have more fitness (pun not intended) since they are better at getting the few survivors.