Sometimes science doesn't take place in a sterile lab, with beakers and pipettes and clipboards and test tubes, but out in nature, with lots of electrical tape and one very angry crocodile. South Floridians, you see, have problems not just with the more common (on these shores, anyway) alligator, but also with crocodiles. There's a population of around 2,000 crocodiles in South Florida, few enough that it seems inappropriate to just shoot them outright when they crawl out of the canals and into your grandma's retirement community, so Floridian biologists have worked out a non-lethal method to make sure they stay away from people's lawns. Crocodiles have an acute sense of direction, and even if they're captured and moved far away, they have an instinct to use that sense to get back to where they were. Their directional savvy is the result of an internal magnetic navigation system, and therein lies the flaw: We know how to mess with magnets! Floridian biologists have lately been experimenting with the distinctly lo-fi method of disrupting the crocs' navigational sense: They tape magnets to a croc's head with electrical tape before moving it far away, and then remove the magnets once it's released into a more suitable (read: fewer grandmas) habitat. The magnets apparently are effective in disrupting the croc's sense of direction, and the croc will typically not be able to return to wherever it was causing such a ruckus. Who knew that crocodiles worked pretty much like cassette tapes?