In the depths of the Grand Canyon, scientists uncovered the fossil of a truly bizarre creature with a retractable throat lined with spiky teeth. Named Kraytdraco spectatus—after a sand-burrowing beast from Star Wars—this ancient "penis worm" sheds light on priapulids, one of Earth’s oldest groups of predators—and their role in shaping early marine ecosystems. Learn more about this fascinating discovery: https://on.natgeo.com/450Pq3z | National Geographic Animals