Deep dive into sunlight viewing specifics
As this is the single most important thing, I think it deserves some dissecting. e.g. why is wearing glasses OK whereas windows not. e.g. what exact angle is low angle and how high is too high. Is it just better to view sunlight throughout the day? What about the issue of cataracts caused by too much light? A lot of people are very wary of sunlight exposure due to this.
Sunlight and skin aging
Since Dr. Huberman is such a proponent of sunlight, I think we need a follow up on the effects of sunlight on skin. Everybody knows not to get sunburned, but what about skin aging. How should be balance getting sunlight for sleep and Vitamin D but not unduly age our skin? This is an important issue and one that hampers getting enough sunlight! Specifically, how do we gauge the harmfulness at various times of day. e.g. is there an easy test to check if the sun is too strong? how many minutes can we be in the sun before it starts causing aging?