Two planetary scientists and an astrophysicist make the case that the search for life in other parts of our universe has been made all the more valid by two recent...
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Roundtable
26:24
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Our universe seems fine-tuned for life, with the constants of physical laws having to be within tight boundaries. Does this mean that the universe has a goal of...
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Topic Series
12 videos
1:30:43
Beginnings are momentous, the beginning of the universe especially so. How did the beginning of our universe happen? Cosmic inflation is the theory that an exponential...
7 videos
1:08:45
It’s among the oldest questions because we humans are rightly obsessed by ultimate origins. Cosmologists can now explain back to the first 10-36 second of our universe...
5 videos
44:06
Everything in the universe has a beginning, but how can the universe as a whole have a beginning? Does the cosmos come with a start date? Does a universal commencement make...
6 videos
57:17
What do scientists mean when they call the laws and regularities of nature beautiful? On the largest supra-cosmic scales, and on the smallest sub-atomic scales, why do...
55:55
How can so many numbers of nature—the constants and relationships of physics—be so spot-on perfect for humans to exist? Coincidence and luck seem wildly unlikely. This...
56:15
We human beings sit roughly midway between the sizes of atoms and galaxies, and both must be so perfectly structured for us to exist. It’s called...
1:07:30
The early universe was a superhot plasma of particles all running seemingly at random as if in a gigantic cauldron. How then the structure we see today with galaxies, stars,...
8 videos
1:08:19
Dark energy, the repulsive energy of empty space, was one of the most unexpected and astonishing discoveries in recent science. Most scientists had expected that the...
57:21
Here’s the claim: conditions of the universe relate to the presence of observers. Does the Anthropic Principle convey deep insights? Or thwart science? For sure, it’s...
Episode
Episode 04
Season 19
26:48
We know our universe is expanding—this is one of humankind’s seminal discoveries. What caused such colossal expansion? We call it the Big Bang, but what were the...
1:13:08