From the specific energy of visible light to the unique properties of water, this degree of fine-tuning for life has a clear message.
Without this ensemble of fitness in nature, there would be no wood, no fire, no metallurgy, no modern technology.
Without lignin, there would be no woody plants, no wood, no coal, no charcoal, no fire, no pottery, and certainly no iron or metallurgy.
There is another aspect of the Earth’s environment that is absolutely crucial in allowing the utilization of fire for metal-based technologies.
The stability of atoms, stars, and people depends on finely tuned physical laws and constants in the local universe. But are they fixed throughout space and time?