Michael Hartl

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Physicist, educator, and entrepreneur. Founder of Tau Day, author of The Tau Manifesto. Formerly of Learn Enough and the Rails Tutorial. “Hartl understands physics deeply… and like Feynman he is an outstanding pedagogue.” —Kip Thorne

3.3K+ subscribers

Michael Hartl’s Substack

By Michael Hartl

Currently focused on math and math learning, with additional subjects likely in the future. Posts include announcements related to Tau Day and The Tau Manifesto, as well as a variety of math topics and curated book and YouTube recommendations.