
Why Are There As Many Males As Females?
Season 6 Episode 5 | 5m 19s
We explain why that is the way it is.
In almost every animal species on Earth, equal numbers of males and females are conceived. Why is that? Especially in populations like lions or elephant seals, where most males don’t get to mate? That’s survival of the laziest, not survival of the fittest. It turns out that in most cases, an equal balance of the sexes is the evolutionary stable strategy.
Problems playing video? | Closed Captioning Feedback
Problems playing video? | Closed Captioning Feedback

Why Are There As Many Males As Females?
Season 6 Episode 5 | 5m 19s
In almost every animal species on Earth, equal numbers of males and females are conceived. Why is that? Especially in populations like lions or elephant seals, where most males don’t get to mate? That’s survival of the laziest, not survival of the fittest. It turns out that in most cases, an equal balance of the sexes is the evolutionary stable strategy.
Problems playing video? | Closed Captioning Feedback
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