If you've ever had a spiny leaf insect as a pet, or you're considering getting one, hopefully someone has warned you about this: if you put one in your enclosure, you might come back some time later ...

Are you familiar with asexual animals? Asexual animals reproduce without involving sex or traditional fertilization. While this might sound strange, it’s actually quite natural—and even helps many ...

It may sound too bizarre to be true, but the Amazon molly (Poecilia formosa), a fish that inhabits rivers, lakes, and swamps in Mexico and Texas, exists over much of its range in populations that are ...

The evolutionary origin of sperm can be traced back to a single-celled ancestor of all living animals. Almost all animals reproduce by having a single-celled stage of their life cycle, involving two ...

Nature is full of wonders, and some of the most amazing surprises come from how animals reproduce. While most of us think that having babies always requires a male and a female, that’s not true for ...

We take it for granted that humans find it more difficult to conceive as they grow older. But our recent study, which analysed data from 157 animal species, found that male reproductive ageing seems ...

All-female animal groups including the Amazon molly fish, Komodo dragon and hammerhead shark. LifeonWhite/sketchify/EllesRijsdijk/MikhailRudenko/rockptarmigan/Nigel ...