Sean Carroll - Did the Universe Begin?

Some scientists claim that the universe did not have a beginning. Some theologians contend that the universe did not need a beginning.

[cnucaptjoe]

Of all the channels that I don't understand, this is one of my favorites.

[willbrink]

Dr. Carroll is always a favorite due his style and ability to explain such topics to us mere mortals.

[kona]

Professor Sean Carroll is the communicator. He's the best at placing his thoughts right in front of you. Never heard anyone explain things so clearly that you actually can understand those things that were off limits to most folks until the professor showed up

[davidsfuntimes]

Sean has an easy way of making complicated theory sound reasonable/understandable even to a layperson like me.

[Uhmjustdudeguy]

He came to my school to speak about his book. I got invited by the philosophy department chair to eat dinner with him and Sean Carol prior to Dr carols talk. I got to have him clarify how an egg how’s the potential to break and then reform and return back to your hand when thrown on the ground. He’s truly a clear communicator of complex ideas.

[NikoGoran]

There isn't a better science communicator then Sean Carroll, quite impressive, thx

[pauldance]

Sean is the very best, at least for me, he explains complex ideas in a simple fashion allowing us non-scientific people have a glimpse into his brilliant mind.

[Dino_LIVE_]

Did he just contradict himself?

At 1:31 he says things can’t be infinite.

At 2:06 he talks about eternal models of the universe

[philjamieson]

Sean is the man to choose to answer the big questions. His clarity, knowledge, and and honesty are refreshing.

[seffundoos]

I absolutely love these conversations, thanks to everybody involved!
Hopefully you have the capacity to continue this series long into the future.

[paulmichaelfreedman]

Although not my favorite, this guy baffles me with his 100% perfect speech and flow of speech.. I can't detect any flaws anywhere in any of his videos. Not even an "uh" . I believe that is one indication of an extremely high IQ.

[endover]

'We cannot trust General Relativity because it leads to infinity (at singularity)' => therefore the Universe didn't have a beginning, it is infinite -

[robis]

So, at 7:55 he entertains that a beginningless universe or an eternal inflation creates unsolvable probabilities, which make perfect sense because math breaks down at infinity. But then at 9:08 he states that a universe with a beginning is also unsolvable. Poor guy.

[eternalme]

I LOVE IT! It's nice to hear the humbleness AND truth in the phrase
' We do not know.' Thank you for Posting this

[HeartHeartBooks]

I think the James Webb will give us more definitive answers.

[ronaldp.vincent]

"I believe it was empty space." "Empty space has a temperature, meaning particles floating around."

So, not empty then...

[lumenr]

Sean makes me feel okay to not understand. Which is very calming to me.

[pipedreams]

Infinite complexity is my understanding of the universe and it grows with each minute, which is simply the way the natural world works.

[arifabd]

At 7:28, he says "Empty space has a temperature which is not quite zero".

If by empty space, he was referring to the universe before the big bang (which is what I think he was talking about; because he was attempting to explain an alternative theory for the reason for stuff to be present at big bang ), then that empty space has to be vacuum. In vacuum, there can be no temperature since there are no particles for energy exchange.

Seems like a big jump to assume temperature.

[johnraba]

If the universe came out of empty space you still have to answer how did empty space get created. Even empty space has physical properties. You just kick the can further down the road.