Some mathematicians in Brazil just ran a simulation to figure out if any countries in the world would be able to survive a zombie apocalypse. And they found there’s only ONE country that would . . . North Korea. According to this study, the problem is, that in the average human versus zombie battle, the zombie’s gonna win. They say, only trained military personnel would really stand a chance. In the study, the only countries that could survive are ones that have at least 47 soldiers for every 1,000 people. And North Korea has 47.4 members of the military for every 1,000 people. By comparison, here in the U.S., it’s 4.2 soldiers for every 1,000 people.