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

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 ...

A common parasite expands across species by abandoning sex, boosting short-term spread while risking long-term collapse.

Insects are everywhere, crawling across sidewalks, hanging out in our gardens, and even invading our homes. Despite ...

The World Health Organisation (WHO) and the World Organisation for Animal Health (WOAH) identify sterilisation and ...

Most animals reach an adult size, then spend the rest of their lives maintaining it. After maturity, their energy goes toward ...

One of the world’s rarest whale species is having more babies this year than in some recent seasons, but experts say many ...

This separation of sexes in plants is called dioecy. One reason why dioecy may evolve is because of the negative effects that ...

Northern elephant seals are protected by federal law, and disturbing them during fasting and breeding can cause stress, ...

Animal rescues are already filled with cats and kittens, so they can’t take in any more. That leaves the solution of trapping and fixing stray and feral cats to keep them from reproducing hundreds of ...

Learn how jellyfish and sea anemones are changing what we know about the evolutionary purpose of sleep.

Ever wonder what animals really think when they encounter us? The image we hold of ourselves wandering peacefully through ...