A new study shows there is a high cost of parenthood, quantifying the 10% “longevity tax” on reproduction. Consequently, mammals that have fewer or no offspring tend to live longer. But why does ...

Reproduction in animals varies from species to species. Some types of reproduction, like parthenogenesis, are more unusual than others. This reproductive method requires only one individual rather ...

Animals have been reproducing sexually for hundreds of millions of years, but not always like we do it. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it ...