Beneath Florida lies the largest known system of springs, home to a plethora of strange life forms. Watch the full episode online.

This video-enhanced lesson uses the NATURE episode "Spring's Eternal: Florida's Fountain of Youth" to learn about and explore Florida's springs ecosystem with particular focus on the animal life that lives there.

These video clips from the NATURE episode "Spring's Eternal: Florida's Fountain of Youth" can be used in the classroom for students to learn about and explore Florida's springs ecosystem with particular focus on the animal life that lives there.

Manatees are marine mammals, like dolphins and whales. But they don't share a dolphin's sleek shape.