Rats—they're a lot like us, in that they're willing to go to weird lengths to get into apartment units in big cities.

One of my least favorite urban myths is the urban myth that rats in your toilet is an urban myth. National Geographic is here to prove to you that not only does it happen, it's disturbingly feasible for a determined rodent to find its way into your house in the most germ-spreading, butt-biting way possible.

Sources: National Geographic