What Is Time , Professor Sean Carroll explains the theories of Presentism and Eternalism

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 predictablejust 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 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