Discover the bizarre facts and fiction about the Virginia opossum's incredible symmetrical reproductive system.

Reproduction is a normal part of life, and while sex might seem like a quick and straightforward process for humans, that’s not always the case in the animal kingdom. Some animals reproduce in rougher ...

OZARK, Mo. — An endangered Ozark hellbender raised by the Saint Louis Zoo has successfully reproduced within the Current River. This is a significant milestone in the recovery efforts of the species, ...

For millions of years, life on Earth has carried on and evolved thanks to finding mates and reproducing. Over those millions of years, species evolved into new species with new behaviors and processes ...

A large-scale analysis of 117 mammal species found that preventing reproduction is associated with longer lifespans, suggesting a strong link between reproductive activity and life expectancy. Why do ...

Meet animals that grow for a lifetime, sometimes for centuries, and discover why dinosaurs did not, despite their huge size.

For a small number of animals, reproduction marks a biological endpoint rather than a stage in an ongoing life cycle. Death ...

For 35 years, American zoologist Laurie Marker has been collecting and storing specimens in a cheetah sperm bank in Namibia, ...

Krish Sanghvi receives funding from Society for the study of evolution (Rosemary grant award). Irem Sepil receives funding from the Royal Society, BBSRC and Wellcome Trust. Regina Vega-Trejo receives ...