Have you ever stopped to ask yourself, "what is time?" We all understand its passage intuitively, experientially. But does time actually exist? Is it a force of nature? A tangible entity? Or is time a human construct--an attempt to comprehend the incomprehensible?
I spoke with theoretical physicist and perhaps the world's premier expert on the science of time, Sean Carroll, to learn more.
Watch the video above and/or click on the link below for a full transcript. And don't forget to sound off in the comments section at the bottom of the page. Come on, talk nerdy to me!