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 ...

Humans ask what things mean. Animals move on. That difference explains both our brilliance and much of our psychological ...

Find out which animals live the longest and what clues this gives us for potentially slowing down human aging.

The origins of consciousness date back about 540 million years ago, when animal bodies became more complex. Feelings like ...

Animals reproduce in a variety of fascinating ways. Some species, including humans and many other mammals, give birth to live young that develop inside the mother’s body. Others reproduce through less ...

Hibernation is a survival strategy animals use when food is scarce, especially during winter. All animals need energy to stay alive, but when cold weather makes food hard to find, some animals slow ...

When danger approaches, many creatures seem to follow the ancient proverb that “the enemy of my enemy is my friend.” Researchers have recently been finding subtle ways that animals communicate with ...

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 ...

Species in the Tanzanian mountain ranges are isolated. ©travellenspro/Shutterstock.com In a paper in the journal Vertebrate Zoology, scientists describe three new ...

How do animals decide when to fight and when to walk, fly, slither, or swim away? Most research on animal conflict has focused on the short-term costs of single interactions, but a pair of behavioral ...