A woman with short brown hair and glasses smiles at the camera. She is wearing earrings and a black top, with a textured red wall in the background.
A woman with short brown hair and glasses smiles at the camera. She is wearing earrings and a black top, with a textured red wall in the background.

Cassandra Willyard

Science Writer, Freelance

Cassandra Willyard is a freelance science writer based in Madison, Wisconsin. She began writing about science in 2004. Her work has appeared in Discover, Popular Science, Nature, Scientific American, New Scientist, and The Scientist, among others. She covers everything from ecology to epigenetics, but her favorite topic is infectious diseases.

By Cassandra Willyard

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