Everything in this Universe is in due proportion and measure. There must be an intelligent creator as He created such a razor-edged universe. Discoveries of physics and cosmology in the last 100 years strongly support the existence of God and the divine creation of the universe. 14 billion years back, the universe was condensed to less than the size of a golf ball. The mass-energy of the initial universe had to be precise to get galaxies, planets, and for us to exist. Same is the matter with other fine-tuning present in Ratio of Electrons and Protons, Ratio of Electromagnetic Force & Gravity, Expansion Rate of Universe, Mass Density of Universe, and Cosmological Constant.
This is the fact that the Bible told us thousands of years ago in the book of Isaiah, chapter 40 verse 12:
Isaiah 40:12: Who has measured the waters in the hollow of his hand, or with the breadth of his hand marked off the heavens? Who has held the dust of the earth in a basket, or weighed the mountains on the scales and the hills in a balance?
One example of fine-tuning is the distribution of mass-energy at that time. How finely tuned must this energy density be to get a flat universe? Answer One part in 10 power120. This number is so small that an astrophysicist explains it with this example.
Cover America with coins in a column reaching to the moon then do the same for a billion other continents of the same size. Paint one coin red and put it somewhere in one billion of the piles. Blindfold a friend and ask her to pick the coin. The odds of her picking it are 1 in 10 power 37.
You can see that it is still far bigger a chance than One part in 10 power120.