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Heinrich Päs is a professor of  theoretical physicis at TU Dortmund University, Germany, working on neutrinos and cosmology. He is a book and nature lover who occasionally dabbles with philosophy. He has written for , , and .

Päs has been a visiting scientist at the Gran Sasso Laboratory in Assergi/Italy, the ICTP Trieste, CERN Theory Division, Fermilab Theory Group, the Aspen Center of Physics and the KITP in Santa Barbara.

He is the author of two popular science books. is about the amazing potential of tiny neutrinos to demystify the universe. is about the mind-boggling idea that, at the most fundamental level, there might be only a single thing in the universe, the universe itself, and that we ourselves, space, time, and matter are nothing but illusions.

Over the years, he has tried to become an inventor of time machines, inspired several science fiction stories and helped to paint the orangutan cage in the Honolulu zoo.