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

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

In the animal kingdom, mating isn’t always about survival. From praying mantises to octopuses, some species die during or ...

The energy invested in animal reproduction is as much as 10 times greater than previously estimated when the metabolic load of bearing and caring for offspring is accounted for, according to a new ...

Animals have been reproducing sexually for hundreds of millions of years, but not always like we do it. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it ...