This video from NATURE explores sea turtles in Cuba--specifically, the role the country's beaches play in sea turtles’ lives and the threats facing the turtles. The segment also examines the efforts biologists in Cuba are taking to help sea turtles.

(Airs Sunday, May 30) Along her 9,000-mile voyage to nest, our loggerhead tour guide encounters hammerhead sharks, deep ocean tempests, and fishing nets.

(Airs Sunday, March 7) Around the globe, unique and fascinating species face extinction. Follow the plight of these creatures and the dedicated conservationists who fight for them.

NATURE's "The Reptiles: Turtles and Tortoises" takes a close look at ancient creatures marching slowly through the millennia.