We have the four fundamental forces and the four stable particles, these are the building blocks of objects -----------
Gravity affects large objects - planets,stars & galaxies. Electromagnetism is the force between protons & electrons allowing molecules to form. Strong nuclear force binds protons & neutrons in the nucleus of an atom. Weak nuclear force governs the decay of radioactive elements & the efficient thermonuclear activity of the sun. Elements vital for our life (particularly carbon, oxygen, and iron) could not exist were it not for the fine-tuning of the four forces evident in the universe.So from where does the precision come?
