Horseshoe Crabs Lived with the Dinosaurs! by Sarah Machajewski

Author:Sarah Machajewski
Language: eng
Format: epub
Publisher: Gareth Stevens Publishing LLLP
Published: 2019-01-16T00:00:00+00:00

THE PREHISTORIC WORLD

The dinosaur Spinosaurus swam in ancient waters, just like the horseshoe crab. It’s the only known swimming dinosaur. Spinosaurus had a large fin-like part on its back and paddle-like feet.

HORSESHOE CRABS’ EYES HAVEN’T CHANGED MUCH OVER MILLIONS OF YEARS. STUDIES OF THEIR EYES HAVE TAUGHT US A LOT ABOUT OUR OWN EYES.

SPAWN POINT

The horseshoe crab’s survival depends on an activity as ancient as the crab itself. In early summer, horseshoe crabs leave the ocean at night and arrive on beaches for their spawning season. Horseshoe crabs sense the moon’s ultraviolet light and know when it’s time to spawn.

Female horseshoe crabs swim to beaches to lay their eggs. Nearby males locate them, and mates arrive on the beach together. The female lays hundreds of eggs in nests.

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