Five questions on the origin of time, the boundary of the Big Bang, and what physics actually says about the moment everything began.
Question 1 of 5
What happens to the concept of "before" at the moment of the Big Bang?
Question 2 of 5
What does the Friedmann equation tell us when the scale factor of the universe approaches zero?
Question 3 of 5
What does the Hartle-Hawking no-boundary proposal suggest about the origin of the universe?
Question 4 of 5
What is the Planck time, and why does it matter for this question?
Question 5 of 5
Which of these correctly describes why human intuition consistently fails when reasoning about the origin of time?
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