Grand Canyon's Ancient Fossils Reveal Early Complex Life

TL;DR
Scientists discovered fossils of early animals like crustaceans and mollusks in Cambrian rocks from the Grand Canyon, providing new insights into the emergence of complex life over 500 million years ago, in a location often overlooked for fossil finds.
- Grand Canyon Fossils Offer Clues of When Complex Life Appeared The New York Times
- Fossilized penis worm suggests Grand Canyon was an evolutionary hotbed The Washington Post
- Half a billion years ago, the Grand Canyon teemed with life Tucson Sentinel
- Spike-Toothed Worm and Other Creatures Lived in Grand Canyon 500 Million Years Ago Discover Magazine
- Treasure trove of half-billion-year-old animal fossils in Grand Canyon cosmosmagazine.com
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