First cause isn't the same as the Big Bang. The Big Bang, or more accurately we should say nucleosynthesis, is an effect, not a cause. Popular Science (SciPop) promotes speculation about a possible first cause.
We're studying the aspects, attributes and characteristics of life to see what we can deduce about our LORD God. We were created in God's image, examining the image will teach us about the nature of God.
We (that's me and the Holy spirit) resolved the Holy Trinity with particle physics and we can now calculate the mass of the observable universe as a portion of the total mass of the universe.