Discover what’s inside a turtle shell, living bone fused to spine and ribs, packed with organs, muscles, and nerves that ...
Most marine animals form their shells from calcium carbonate, which is a tough mineral also found in limestone. Some sponges ...
For a male hermit crab, sex is a dangerous business, says Stuart Blackman. With a penis tucked away safely within the coils of his shell, he must come out into the open to fertilise a female, which ...
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