After tagging more than 75 sharks, researchers at the University of Miami have built a database that tracks the movements of several species. The nine individuals here have vastly different migration patterns. The bull shark Lia covered only 20 miles over 74 days, while Linda, a tiger shark, traveled more than 2,000 miles up the Eastern seaboard. “She encircles an area the size of a billion football fields,” says Hammerschlag. “I had no idea we would see that scale.”
This article originally appeared in the May 2013 issue of Popular Science. See the rest of the magazine here.