Tom Zeller Jr. is an American journalist, former New York Times reporter and columnist, and current editor in chief of the digital science magazine Undark.

His debut book is The Headache: The Science of a Most Confounding Condition, published by HarperCollins/Mariner in July, 2025. Part memoir, part scientific whodunnit, Tom’s search for the origins of his own headaches becomes a journey into the inner workings of the human nervous system, and an illuminating look at the nature of pain itself.