What Is Time? | Professor Sean Carroll Explains Presentism and Eternalism

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It's said that the clock is always ticking, but there's a chance that it isn't. The theory of "presentism" states that the current moment is the only thing that's real, while "eternalism" is the belief that all existence in time is equally real. Find out if the future is really out there and predictable—just don't tell us who wins the big game next year.

This video is episode two from the series "Mysteries of Modern Physics: Time", Presented by Sean Carroll
Learn more about the physics of time at https://www.wondrium.com/YouTube

00:00 Science and Philosophy Combine When Studying Time
2:30 Experiments Prove Continuity of Time
6:47 Time Is Somewhat Predictable
8:10 Why We Think of Time Differently
8:49 Our Perception of Time Leads to Spacetime
11:54 We Dissect Presentism vs Eternalism
15:43 Memories and Items From the Past Make it More Real
17:47 Galileo Discovers Pendulum Speeds Are Identical
25:00 Thought Experiment: “What if Time Stopped?”
29:07 Time Connects Us With the Outside World

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