9

The study is basically worthless. First, the study was not constructed to test this hypothesis, so it's just something interesting that may point to future studies. It does not provide sufficient evidence. But the biggest problem is that the study was of 52 individuals with only one or two samples, which makes it statistically useless. Any uncontrolled ...


3

Hormones explain the sexual dimorphism. Expose females to androgens and they develop masculine facial hair. See hirsutism. Also research: ... women’s intermediate facial follicles respond to men’s higher androgen levels by synthesizing more hair over several days ....


2

Evolutionary effects only show up when they have a strong impact on the number of descendants that are produced. Any disadvantageous effects due to things like food additives and tobacco appear to be quite small with respect to the ability of people to produce children and grandchildren. Moreover, since humans are social animals whose reproductive success is ...


1

There are two phenomena described in the quoted text, and while there is some relationship between them, they are indeed distinct: spectral sensitivity of the human eye, and longitudinal/axial chromatic aberration of the eye resulting from variation of refractive index of the lens by wavelength. I found the following on Physics.SE: https://physics....


1

This is something I have been researching on and off for many years. I studied nutrition back in the early 1980s and our lecturer always said that "fats burn in the flame of CHOs". He said that the citric acid cycle was dependent on oxaloacetic acid - the predominant source was from glucose (pyruvic acid). https://www.sciencedirect.com/topics/...


Only top voted, non community-wiki answers of a minimum length are eligible