Contributor Phil Torres spent five days in the Bahamas with a team of research scientists studying tiger sharks—an apex predator whose survival has a profound impact on other species in the sea. The warm waters where they track these sharks appear to be a good habitat for females to spend their 10- to 15-month gestational period. Using veterinary ultrasounds, they can determine—in real time—whether a shark is pregnant and, if so, how far along.
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