Sponges: Oldest Creatures in the Sea? -
changing seas
Shows how recent DNA research has cast doubt on the theory that sponges were the first animals to branch off the "Animal Tree of Life, " a kind of family tree for all living and extinct animals on earth. Recently, some scientists are suggesting that ctenophores, also known as comb jellies, are an older lineage.
Duration: 26 minutes and 46 seconds
Episode Number: 801
No future air times were found for this episode.
About Changing Seas:
CHANGING SEAS takes viewers on an exciting adventure to the heart of our liquid planet.
The documentary series offers an unprecedented look at how oceanographers and experts study earth's vast underwater wilderness, while shedding light on how over-fishing, global climate change and pollution threaten ocean resources.
Watch Changing Seas - Clips, Episodes & Previews
Habitats: The Key to Florida's Fisheries
Grouper Moon
Sponges: Oldest Creatures in the Sea? - Trailer
Sponges: Oldest Creatures in the Sea?
Dolphins: Breaking the Code
Lords of the WetlandsFuture Broadcast times for "Changing Seas": (show all)
| Sun, Feb 15 | 6:30 A.M. | Manatees: Conserving A Marine Mammal NHPBS (11.1) |
| Sun, Feb 22 | 6:30 A.M. | Maug's Caldera: A Natural Laboratory A Co-Production with Open Boat Films NHPBS (11.1) |
| Sun, Mar 22 | 6:30 A.M. | Beneath The Bridge NHPBS (11.1) |
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