Smithsonian Magazine on MSN
This 500-million-year-old fossil of a claw-bearing predator uncovers the origins of spiders, scorpions and other arthropods
A fresh look at a fossil found more than 40 years ago points to the origins of a widespread group of arthropods called chelicerates. While that name might not sound familiar, its modern-day members ...
Humans exhibit rapid, intense reactions to snakes and spiders, rooted in ancient survival instincts. Specific visual cues like enlarged chelicerae and body hair trigger fear and disgust, activating ...
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