Female mice often have multiple sexual partners--for survival

Birthing a litter with several fathers may help when food is scarce. Breakthroughs, discoveries, and DIY tips sent six days a week. If a female house mouse mates with multiple male house mice, her litter could have multiple fathers. Polyandry, as this mating practice is called, is common for various species. Yet scientists are still investigating its purpose and the potential benefits of birthing half siblings within the same litter.