Chapter 2 starts from the beginning of the universe, detailing how our little plot of space was created and why its conditions were crucial to making it what it is today. To walk you through, 13.77 billion years ago, everything began with the Big Bang. As this novel thing called “time” progressed, we see the creation of the first atoms (hydrogen) and, depending on the density of certain spots in space, small variations overtime could become much more exaggerated and form galaxies. Nuclear fission in stars made new elements, providing us with the chemical evolution that later spawned life. Some of these, mostly iron and silicates, formed Earth 4.5 billion years ago. Both some radioactive elements as well as the impact from Theia (the planet that hit us and created the moon) melted much of the iron and gives us our molten iron core. This is why we have the magnetosphere protecting us from solar wind and along with the ozone stopping UV-C (germicidal radiation) at about 35k altitude. Without it, living cells wouldn’t be able to exist. Additionally, our planet is a “Goldilocks Planet,” as it is in such a position that it is not too hot nor too cold for life. Our axis provides us with seasons, and our moon provides tidal effects in water and rock. Without all this, life would be unlikely to have formed all those 3.5 billion years ago…
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