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How long have jellyfish lived in the ocean? This jellyfish fossil is from the...
Dugongs, along with manatees, make up a group of marine mammals called sirenians or...
Walrus Rests on Ice
Walruses use sea ice as platforms on which to nurse their young and launch their...
Giant Megatooth Model
A life-sized model suspended over visitors at the San Diego Natural History Museum...
Where ocean currents were strong, ancient rudist “recliners” lay unattached on...