What happens when you lose a keystone species, like sea otters or kelp? Find out in "Extinction: The Facts,” now streaming on the PBS Video app. | PBS
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What happens when you lose a keystone species, like sea otters or kelp? Find out in "Extinction: The Facts,” now streaming on the PBS Video app. | PBS
PBS. . What happens when you lose a keystone species, like sea otters or kelp? Find out in "Extinction: The Facts,” now streaming on the PBS Video app.
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