This.The first law does not hold on a cosmological scale. — Pfhorrest
Yes, scientists don't say that the universe was "created" at the Big Bang, but it is commonly said that matter can't be created or destroyed, which is the only context I see Benj96 using the term. — QuixoticAgnostic
My largest uncertainty is not understanding what space-time is. If I think about it, it rather sounds like we are describing trajectories. Space... doesn't seem to exist. Does it? What is space? It's simply a dimension as far as I can tell (ie distance, relationship etc). Time is a measure of change. — Graeme M
At cosmological scales time translation symmetry breaks down and, as a consequence, so does energy conservation. — InPitzotl
True story. Back in the 60s - that's the 1960s, not the 1860s - I was an under-grad Physics major. Thermodynamics was not on the undergrad curriculum. — EricH
At the end, during the Q&A period I asked how it was that the universe had such a low entropy value. The professor's response??
"When God created the universe he created the Second Law of Thermodynamics" — EricH
Hard to re-collect - that was 50 years ago. For whatever reason, even tho I was a physics major, it was a liberal arts degree - I took Philosophy 101/2, World History, French Literature, Art History, etc.Wha...? What was on the curriculum? — SophistiCat
It was funny at the time. Guess you had to be there . . . . . .Well, that's a crap answer and not even a good joke. — SophistiCat
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