00:00Unveiling the Secrets of the Big Bang
00:02What came before the Big Bang?
00:04For a long time, this question was considered meaningless by scientists.
00:08When wound backward in time, Einstein's equations of relativity lead us to a singularity,
00:13a point of infinite density and temperature where the laws of physics collapse.
00:18It's as if the universe itself is telling us we can't see beyond that limit.
00:22The problem lies in a fundamental assumption that the universe is homogeneous and isotropic,
00:27meaning it looks the same in every direction.
00:30While this idea holds for the universe today,
00:33it may not be true for the extreme conditions of the Big Bang.
00:36Cosmologist Eugene Lim explains it this way.
00:39It s as if we can only look where there s light near the lamppost,
00:44but not in the vast areas of darkness.
00:46But now there's a way out of that darkness.
00:49It's called numerical relativity,
00:51a technique that uses supercomputers to simulate and solve Einstein's equations in extreme scenarios,
00:57such as the collision of black holes.
00:59This idea, first proposed in the 1960s,
01:02has been boosted by technological advances like the LIGO experiment,
01:06which opened a new horizon for cosmology.
01:09Thanks to this approach,
01:10scientists are seeking to solve the universe's greatest mysteries.
01:13One is cosmic inflation,
01:15the period of ultra-rapid expansion that occurred shortly after the Big Bang.
01:20Numerical relativity could help test fundamental theories like string theory
01:23and discover what caused that explosive growth.
01:26It could also help find evidence for the existence of the multiverse
01:30by looking for signatures or bruises left by the collision of our universe with others.
01:35It could even confirm the existence of cosmic strings,
01:38defects in the fabric of space-time,
01:40by calculating the gravitational waves they would generate.
01:44But the most fascinating challenge is, without a doubt,
01:47finding out if there was anything before the Big Bang.
01:50This new technique could reveal whether our universe is part of a cosmic cycle,
01:54a series of bounces where an old universe gives rise to a new one
01:58in an eternal dance of Big Bangs and Big Crunches.
02:02Solving this puzzle requires a computing power we are only now beginning to have.
02:07As supercomputers become more powerful,
02:09so does our ability to unravel the deepest secrets of the cosmos.
02:14Numerical relativity is the bridge that connects cosmology with advanced technology,
02:20leading us to a future where questions once thought unanswerable
02:23can finally have a solution.
02:26Money expires
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