Science
Ferocious ‘penis worms’ were the hermit crabs of the ancient seas – Livescience.com
These phallus-shaped worms were some of the top predators of the ancient seas — but even they needed protection.
The Cambrian period (543 million to 490 million years ago) brought the first great explosion of biodiversity to Earth
, with the ancestors of practically all modern animals first appearing. One of the most feared among them was the penis worm.
Technically…
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