Predators may have spurred evolution of ancient brittle stars

Threats to species can encourage evolution, leading to animals with harder shells or other defensive adaptations. In a recent study in the Journal of Systematic Palaeontology, researchers found that while some ancient brittle stars — relatives of starfish with long, whip-like arms — evolved in the face of threats, some adapted a different approach: they moved.

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Sarah Derouin

Sarah Derouin is an EARTH editorial intern.

Derouin is freelance writer. Before becoming a science writer, Derouin earned a Ph.D. in glacial geology from the University of Cincinnati and worked for the Bureau of Reclamation in seismic hazards and geomorphology. She is a graduate of the science communication program at the University of California-Santa Cruz. You can see more of her work at www.sarahderouin.com.

Wednesday, January 10, 2018 - 06:00