Scientists are still discovering how many systems, controls, and other aspects of planetary fine-tuning are in place to ensure that we have abundant life.
How different our perception of reality would be if our brains processed visual signals from the optical nerve as only varying shades of beige or pink or grey!
The sun has a fantastic range of electromagnetic radiation, from high-energy gamma rays all the way to long wavelength radio waves.
“The atmosphere lets through just the light we need,” says Denton, “and the sun puts out just the light we need. It’s a remarkable coincidence.”
I remember well, one particularly cold winter, seeing Snoqualmie Falls in Washington State completely frozen throughout its 268-foot drop.