Men are capable of impregnating multiple women in the same time period, causing humanity to grow much faster than if each man was only producing one child each year.
Wanaume wana uwezo wa kuwatia mimba wanawake wengi katika kipindi kimoja, na kusababisha ubinadamu kukua kwa kasi zaidi kuliko kama kila mume alikuwa tu anazalisha mtoto mmoja kila mwaka.