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Parasites are creatures that live in or on a host animal. Some people dislike parasites because they can be slimy, and they often cause harm to their host, but they can also play a key role in supporting ecosystems. Now, climate change is threatening the survival of host animals such as elephants and polar bears, putting their parasites at risk, too. Listen to hear about the surprising life cycle of a flatworm and learn what scientists are doing to try to save important parasites.
Story Length: 2:37
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