Happy 80th Birthday to Ocean Guardian Sylvia Earle

Beloved ocean explorer Sylvia Earle celebrates her 80th birthday on August 30, 2015. National Geographic gets the party started by celebrating some of her amazing achievements. Among her credits: She set a world record for the deepest untethered dive, at 1,250 feet; she's logged more than 7,000 hours underwater on more than a thousand expeditions; she served as the first female chief scientist in the National Oceanic and Atmospheric Administration's history; and she was lauded as a Champion of the Earth, the United Nations' top environmental award. Plus, she's just plain cool. Happy birthday, Sylvia! Thank you for inspiring generations of explorers.