NOVA - Season 37 - Eps 13: Extreme Cave Diving
"Extreme Cave Diving" follows a fearless team of scientists as they venture into blue holes—underwater caves that formed during the last ice age, when sea level was nearly 400 feet below what it is today. These caves, little-known treasures of the Bahamas, are one of Earth's least explored and perhaps most dangerous frontiers. The interdisciplinary team of biologists, climatologists, and anthropologists, led by renowned cave explorer Kenny Broad, discover intriguing evidence of the earliest human inhabitants of the islands, find animals seen nowhere else on Earth, and recover a remarkable record of the planet's climate. The stakes are high as the scientists swim hundreds of feet through narrow, dark passages that have trapped and killed divers in the past, but the scientific payoff is considerable.
About NOVA

Title: NOVA
First Air Date: 1974-03-03
Last Air Date: 2025-05-14
Status: Returning Series
Rating: 7/10 (from 127 votes)
Language: EN
Seasons: 53
Total Episodes: 1005
Network: PBS
Genres: Documentary
Production Companies: GBH
Synopsis
PBS' premier science series helps viewers of all ages explore the science behind the headlines. Along the way, NOVA demystifies science and technology, and highlights the people involved in scientific pursuits.