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mammal fossils are mostly male, likely because the males were more likely to do silly things, like die in tar pits.
mammal fossils are mostly male, likely because the males were more likely to do silly things, like die in tar pits.
Clownfish are all born male.
80% of males born in the Soviet Union in 1923 did not survive World War II.
In males, 80% to 95% of REM sleep is normally accompanied by partial to full penile erection.