@princetonupress: What is "now"? ⁠ Quantum physicist, New York Times bestselling author, and BBC host Jim Al-Khalili explains. You can watch the full video on our YouTube channel (@princetonupress) and order your copy of Jim Al-Khalili's new book, On Time: The Physics That Makes the Universe Tick, on our website! @unbaffledscience | #OnTime #Time #Physics #JimAlKhalili #Science #Education

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Friday 04 September 2026 13:00:00 GMT