We can never use humans to directly test out the theories. We can only make inferences based on natural observation.
More Quotes from Ralph Catalano:
The weak boys got culled out and those boys that survived are hardier on average. They live longer.Ralph Catalano
The culled-cohort theory is based on the assumption that it is not in the mother's interest to have small or weak male offspring during times of stress. Weak males are less likely to survive to age of reproduction. Even if they do survive, they must then compete with strong males for females.
Ralph Catalano
It's not in her evolutionary interest to have a weak son in times of stress. He may not survive or may not be competitive for females.
Ralph Catalano
During the Kobe earthquake in Japan, sex ratio drops. The collapse of the east German economy, sex ratio drops. The major smog in London in 1952, sex ratio dropped. Variation in the economy such that you get very bad economic times in Sweden over a century and a half, sex ratio drops.
Ralph Catalano
These findings demonstrate yet again that we need not go to museums of natural history to find evidence of natural selection.
Ralph Catalano
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I wish you a tolerable Thursday. That's all any of us can hope for.
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Of course, in later years, I'd studied acting more than ever before - mostly with the late Stella Adler, who was marvelous! - but in my earlier years, I couldn't afford to do this.
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