The anthropic principle claims that the universe is fine-tuned precisely to allow for human life. This means that the physical laws and constants of the universe are suitable for the existence of life, suggesting a coincidence that is beyond huge. If these physical constants were slightly different, life would not be possible.
This coincidence has led some to believe that the universe is being guided by an intelligent force. While this is undoubtedly a theological possibility, it is also a scientific explanation, albeit a poor one. The multiverse hypothesis suggests that there is an infinite number of possible universes, each with different physical constants. In some of those universes, perhaps in very few, the constants and laws of physics are adjusted in such a way as to enable our existence.