- 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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