If we're playing that game:
- Human muscles get energy from food.
- Food is or gets its energy from plants.
- Plants get energy from the Sun.
- The Sun's energy comes from gravity-forced fusion.
So gravity :)
- Human muscles get energy from food.
- Food is or gets its energy from plants.
- Plants get energy from the Sun.
- The Sun's energy comes from gravity-forced fusion.
So gravity :)
the FLRW model of cosmology, which has made numerous confirmed predictions teaches us that the big bang is a geometric property of space-time i.e. a consequence gravity, and particularly Einstein's field equation from general relativity.
It's interesting to put that in perspective: the pyramids were built out of solar energy by way of muscle. Skyscrapers are built out of solar energy mostly by way of diesel fuel.
No wonder we're seeing exponential growth with that injection of stored energy into society. The industrial revolution is a coal-powered nitro.
https://www.youtube.com/watch?v=N1pIYI5JQLE
He explains the light of a fire is just the light of the Sun, it's just been stored in the wood