Inquiring Minds

Remember those stick-figures of chemical compounds you were forced to memorize in high school? Remember how useless it seemed at the time? Can you still articulate the difference between a covalent bond and an ionic one (without checking Wikipedia)? If not, pay attention: You might be caught flat-footed during the zombie apocalypse.The CDC suggests (half-seriously) having a zombie-preparedness kit (after all, it would also be useful in case of pandemics and hurricanes). But chemist and blogger Raychelle Burks has a simpler solution—one that would have greatly de-grossified a famous scene from The Walking Dead, in which Rick and his fellow apocalypse survivors slathered the guts of dead humans all over themselves, to jam the zombies' chemosenses with the smell of rotting flesh and thereby, escape."They used chemical camouflage," explains Burks, to trick the zombies into thinking they were fellow undead. The only problem: Icky and dangerous exposure to blood, guts, and pathogens. Burks has a better id