By about 1900 the observations of Hertwig, Fol, and others were brought together to make the now-familiar picture: a single ...

Considered a delicacy in several parts of the world, sea urchin, or uni in Japanese, is prized for its unique flavor. But the cost of the gonads — the orange tongues found inside an urchin ...

It's believed the sea urchin survived a snack attack by an aquatic lizard An amateur paleontologist has discovered a rare 66-million-year-old sea urchin on a beach in Denmark. Peter Bennicke ...

"We know the pathogen hurts," says Dr Omri Bronstein at Tel Aviv University, placing a dead black sea urchin - its body the size and shape of a flattened tennis ball - into my hands. He says there ...