You are probably familiar with the concept that the universe is “fine-tuned” for life on earth. That is, if the earth were very slightly closer to the sun, it would be too hot to sustain life, since liquid water would boil away, among other reasons. And if the earth were very slightly farther away from the sun, it would be too cold to sustain life, since liquid water would be frozen. Similarly, if the earth had a little more oxygen or a little less oxygen, life would be impossible, going along with a host of other factors. Life on earth is possible only because of this “Goldilocks” effect, of conditions being “just right.”
Cosmologists and other scientists do not dispute this reality. Many of them insist that we are just very lucky, though others posit the existence of an infinite number of parallel universes to account for it. Christians and other theists say that the finely-tuned nature of the universe is evidence for the existence of God, a mind behind the universe who designed and created everything.