Here’s an experiment in which David’s lab studied time perception by dropping volunteer subjects from a 150 foot high tower. Free fall. Subjects are going 70 miles per hour when the hit the net.

For a popular-science essay that lays out the mysteries of time perception, see his essay Brain Time (published in What’s Next? Dispatches on the Future of Science. M. Brockman, Ed).

For a more detailed explanation of the how and why of the scientific approach, see experimental questions.

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