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  Discover Magazine: Living Fossils
Video Information and Comprehension Questions

Video Description
Meet Earth’s oldest living inhabitants: the 250-million-year-old horseshoe crab, the 350-million-year-old coelacanth, and the Archaea, a tiny, ancient class of microorganisms with a taste for extreme environments. These prehistoric creatures haven’t changed in eons, but the way scientists study them has. Discover what each can teach us about our past and our future.

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