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Tadpole Shrimp
You don’t need to know the exact age of tadpole shrimps to see that these creatures are prehistoric. They just have this weird ‘ancient’ look that can’t be confused with something else. Tadpole shrimps (also called ‘shield’ shrimps because of their look) develop quickly from an egg into an adult and it takes them mere three weeks to grow up. It’s easy to see how they’ve survived for 250 million years, outliving dinosaurs and other big prehistoric creatures.
