Quite an advantage in today’s world.

A children’s book that includes illustrations of animals mating will remain on the shelves of several Orange County middle ...

The improvements in animal care that have led to the aging population problem are laudable, but must now be accompanied by ...

A children’s book that includes illustrations of animals mating will remain on the shelves of several Orange County middle ...

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

Sealed surfaces, artificial light and constant noise: What is part of everyday life for humans poses major challenges for ...

Many mammal populations in European and North American zoos are aging – a trend that jeopardizes the long-term viability of so-called reserve populations and, with it, a core mission of modern zoos in ...

Many mammal populations in European and North American zoos are aging—a trend that jeopardizes the long-term viability of so-called reserve populations and, with it, a core mission of modern zoos in ...

Elephant seals look like clumsy blobs on land, but they are biological extremes. Adult males can weigh over 4,000 kilograms, making them the largest members of the carnivore order. That size isn’t for ...

Epaulette sharks can reproduce without any measurable increase in energy use, stunning researchers who expected egg-laying to ...

For a small number of animals, reproduction marks a biological endpoint rather than a stage in an ongoing life cycle. Death follows mating with such consistency that it can be predicted within a ...