Beluga whales can disappear beneath Arctic sea ice for long stretches, which makes them far tougher to follow than many other whale species. That is why researchers have increasingly turned to ...

Wild turkeys can feel like a steady presence, a familiar silhouette at field edges and oak ridges. Yet wildlife biologists ...

The Surinam toad has an unusual trick for reproduction: instead of leaving their spawn in water to develop, once the eggs are laid, the male presses them into the female's back.

These “walking sharks” can lay eggs without spending extra energy, rewriting what scientists thought they knew about reproduction.

Early in development, many animals pick a team—male or female—based on their genetics, and, with time, acquire the ...

Women in India were told they couldn't be paid for their eggs. The result: a black market for eggs from women in need of ...

A new study shows there is a high cost of parenthood, quantifying the 10% “longevity tax” on reproduction. Consequently, mammals that have fewer or no offspring tend to live longer. But why does ...

New research suggests that women experience a distinct decrease in sexual motivation during a specific phase of the menstrual ...

Shortly after her arrival last fall, Amelia Gray met Hudson, and the pair hit it off immediately. They touched their noses ...

New research shows that epaulette sharks, often called “walking sharks,” can produce eggs without increasing their overall energy use.

Testosterone is being sold as the missing hormone for midlife women. Except there's no FDA-approved female dose, so sourcing and dosing has become the Wild West. How did we get here, and what comes ...

Mating calls and rituals can be intercepted, or drowned out, by invasive species. Scientists are just starting to understand ...