The 4 Greatest Mysteries of Physics

There are still some great mysteries of our universe that physicists can't explain. How is that possible? Join us as we break down the 4 greatest mysteries of physics in this episode of SciShow hosted by Michael Aranda!

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https://www.space.com/25075-co....smic-inflation-unive
Why we need inflation: https://www.space.com/42202-wh....y-we-need-cosmic-inf
https://www.space.com/42261-ho....w-did-inflation-happ
Inflation review: https://arxiv.org/pdf/hep-ph/0304257.pdf
Evidence for inflation https://www.forbes.com/sites/s....tartswithabang/2019/
GW detection: https://iopscience.iop.org/art....icle/10.1088/1475-75
Penrose cyclic cosmology: https://aip.scitation.org/doi/....abs/10.1063/1.472799
https://physicsworld.com/a/new....-evidence-for-cyclic

Fine-tuning:
Fundamental constants: https://www.forbes.com/sites/e....thansiegel/2015/08/2
Fine-tuning 1: https://www.symmetrymagazine.o....rg/article/fine-tuni
Fine-tuning 2: https://www.pbs.org/wgbh/nova/....article/scientific-a
Fine-tuning 3: https://www.forbes.com/sites/s....tartswithabang/2019/
Fine-tuning 4: https://plato.stanford.edu/entries/fine-tuning/
Fine-tuning 5: https://books.google.co.uk/books/about/Just_Six_Numbers.html?id=4XPhAgAAQBAJ&printsec=frontcover&source=kp_read_button&hl=en&redir_esc=y#v=onepage&q&f=false
Fine-tuning 6: https://www.cambridge.org/core..../journals/publicatio
Anthropic principle: https://www.britannica.com/sci....ence/anthropic-princ

Theory of everything: https://www.quora.com/What-are....-the-Grand-Unified-T
GUT: http://nautil.us/issue/46/bala....nce/a-brief-history-
Theory of everything 1: https://www.forbes.com/sites/s....tartswithabang/2017/
ToE 2: https://www.space.com/theory-o....f-everything-definit
Alternatives to string theory: https://www.forbes.com/sites/s....tartswithabang/2015/
LQG: https://arxiv.org/abs/0711.0146
Unification: https://www.pdcnet.org/jphil/c....ontent/jphil_1996_00
Quantum gravity: https://arxiv.org/abs/gr-qc/0108040
Causal Set Theory: https://arxiv.org/abs/1903.11544
What is String Theory?: https://math.berkeley.edu/~kwr....ay/papers/string_the


Image Sources:
https://www.istockphoto.com/ph....oto/star-field-at-ni
https://www.istockphoto.com/ph....oto/large-scale-stru

https://commons.wikimedia.org/....wiki/File:COSMOS_3D_
https://commons.wikimedia.org/....wiki/File:Fermilab.j
https://en.wikipedia.org/wiki/File:Calabi_yau.jpg
https://commons.wikimedia.org/....wiki/File:Spacetime_
https://commons.wikimedia.org/....wiki/File:Storage_ri
https://svs.gsfc.nasa.gov/10137
https://en.wikipedia.org/wiki/....File:CMS_Higgs-event
https://en.wikipedia.org/wiki/....File:Planck_satellit
https://imagine.gsfc.nasa.gov/....educators/programs/c
https://www.istockphoto.com/
https://www.storyblocks.com/

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