A reader recently wrote to us inquiring about the evolution of worms. He asked several specific questions about the evolutionary history of worms, not all of which we can answer, but we can sketch a picture, even if incompletely, of the evolution of worms.
The limb boring worm tunnels into hard materials such as rocks and shells. While you may never witness a boring worm in action, you may notice their bodies sticking out of mollusk shells and rock cracks after they have tunneled through.
Do you know how many species of segmented worms there are? Did you know that segmented worms are highly evolved, with a circulatory system and complex nervous system? There are over 12,000 species of segmented worm – how many segmented worms can you name?