Several Cape Cod beaches have banned swimming this weekend after four great white sharks were spotted prowling the waters, the Cape Cod Times reports. Shark expert Gregory Skomal and his crew tagged two of them—described as 8 and 10 feet long—with high-tech trackers. It was a rare instance of experts tagging Atlantic great whites to follow their migratory patterns. "From a scientific perspective, it's fantastic," said Skomal.
(Read more great white shark stories.)