Pawson has spent the last 60 years carefully studying and classifying thousands of echinoderms, a diverse and ancient group of marine invertebrates. Adrian James Testa, Smithsonian Institution ...

Researchers Trace Evolutionary Trajectory of Starfish's Unique Symmetry Through a 500 Million-Year-Old Fossil The star shape ...

Learn how starfish got their shape after a complicated evolutionary process, starting with an ancestor that lived 500 million ...

Image: McLaughlin, Wilson, Rouse/Invertebrate Systematics These animals are broadly related to starfish, sea cucumbers, and other echinoderms, but not too much is known about them.

Starfish are echinoderms, a form of invertebrate marine animals known for radial symmetry and having spiny skin. Researchers said most animal species have similar genetic structures, prompting ...

Ellen Goethel is a marine biologist and the owner of Explore the Ocean World Oceanarium at 367 Ocean Blvd. at Hampton Beach.

Animal research largely targets those that share similarities with humans. But studying groups like echinoderms could solve some of the most complex mysteries about the evolution of life on Earth.

Invertebrates, which constitute over 95% of all animal species, are the unheralded engine underpinning Earth’s biodiversity and ecosystem functioning. Their astonishing diversity – ranging ...

Invertebrates (the collective term for animals without bones) account for more than 95 percent of all Earth animals. We, and anything structured remotely like us, are in the zoological minority.

Animals that don't have a backbone are called invertebrates. Find out more in this Bitesize Primary KS2 Science guide.