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Energy cannot be created or destroyed, it's one of the most fundamental laws in all of physics. But if that's true, where did all the energy in the universe actually come from? How can there be any energy at all if nobody ever made it?
In this video, we trace energy all the way back from the food you eat to the sunlight that grew it, from the nuclear fusion powering the sun to the mass locked inside protons and neutrons, from the first three minutes of the Big Bang to the astonishing possibility that the total energy of the entire universe might be exactly zero.
Sources:
Feynman, R.P., Leighton, R.B. & Sands, M. (1963). The Feynman Lectures on Physics, Volume I, Chapter 4: Conservation of Energy. https://www.feynmanlectures.caltech.edu
Griffiths, D.J. (2008). Introduction to Elementary Particles (2nd Edition). Wiley-VCH.
Weinberg, S. (1977; updated 1993). The First Three Minutes: A Modern View of the Origin of the Universe. Basic Books.
Tryon, E.P. (1973). "Is the Universe a Vacuum Fluctuation?" Nature, 246(5433), 396-397. https://doi.org/10.1038/246396a0
Misner, C.W., Thorne, K.S. & Wheeler, J.A. (1973). Gravitation. W.H. Freeman and Company.
#energy #physics #conservation #bigbang #universe #science #cosmology
