Author: IFTV
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CalTech theoretical physicist and author of From Eternity to Here, Sean Carroll, explains the "arrow of time" in physics pointing out its close association with "entropy", a measure of the ever increasing disorder of the universe. Disorder is what humans experience as the passage of time. In the second half of his IF Conversation, Carroll suggests that cosmologists increasingly ask "what happened before time?" - and believes that modern astronomy and physics might explore the period before the Big Bang.