Mr. Sean
Carroll is a physicist at the Caltech. His research includes the theoretical
physics and astrophysics, especially the cosmology, field theory, and
gravitation. He has published several research papers dark matter and dark
energy, modified gravity, violations of Lorentz invariance, extra dimensions,
topological defects, and cosmic microwave background anisotropies.
He has also
published several researchers on causality violation, black holes, and the
cosmological constant problem. He is currently focused on origin of the universe
and the arrow of time, including the roles of inflation, baby universes, and
quantum gravity.
In his
recent video by Techinsider, he explains what existed before Big Bang and it
actually means. So watch and learn:
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