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02/04 23:22
smithsonianmag.com
This 500-Million-Year-Old Fossil of a Claw-Bearing Predator Uncovers the Origins of Spiders, Scorpions and Other Arthropods
fossil
chelicerate
arthropod evolution
spiders
scorpions
Cambrian
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/https://tf-cmsv2-smithsonianmag-media.s3.amazonaws.com/filer_public/df/98/df98b734-864a-4e02-8833-16dadedb682d/smithsonian_feature_images_21.png "This 500-Million-Year-Old Fossil of a Claw-Bearing Predator Uncovers the Origins of Spiders, Scorpions and Other Arthropods")
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