Sex

In the ancient Roman world, sexual pleasure was a cause for celebration rather than a source of shame.

Why Was Erotic Art So Popular in Ancient Pompeii?

A new exhibition spotlights 70 examples of sensual imagery discovered in the Roman city

A male Philoponella prominens spider (top) mates with a female.

This Male Spider Catapults Itself Into the Air to Avoid Sexual Cannibalism

The arachnids propel themselves to safety at breakneck speeds after they’ve mated to avoid being eaten alive

Biologists of the past often explained the vast spectrum of animal genitalia with "lock-and-key": the hypothesis that vaginas and penises had primarily evolved to fit into each other mechanically. Today, there is a growing appreciation for the myriad of forces acting on genitals.

Why Have Female Animals Evolved Such Wild Genitals?

From ducks to dolphins, females have developed sex organs that help them deter undesirable suitors and derive pleasure from non-reproductive behavior

ONE Condoms become the first condoms approved for anal sex by the FDA. 

FDA Approves First Condom for Anal Sex

Health experts say FDA authorization may increase condom usage during anal intercourse and reduce sexually transmitted infections

The Shakers, who reached the peak of their popularity in America between 1820 and 1860, loathed the institutions of marriage and family for the sinful “natural affections” that accompanied them.

The Sects That Rejected Sex in 19th-Century America

Why three religious groups traded monogamy for celibacy, polygamy and "complex marriage"

A female dolphin cald swims about her mother at the Madrid Zoo and Aquarium in 2018.

Female Dolphins Have a Fully Functional Clitoris

A new study finds surprising similarities between human and cetacean sexual anatomy

A male (left) and female (right) Nala lividipes earwig

Half of These Earwigs Use Their Right Penis. The Other Half Use Their Left Penis. Why?

Scientists mated males with females under a microscope to try and understand why some are southpaws and others are righties

Adam Driver (left) plays Jacques Le Gris, a French squire accused of raping Marguerite, wife of knight Jean de Carrouges (right, played by Matt Damon).

The True History Behind 'The Last Duel'

A new film from Ridley Scott dramatizes the 1386 trial by combat of a medieval man accused of a horrific crime

Mary Ware Dennett wrote The Sex Side of Life in 1915 as a teaching tool for her teenage sons.

The Sex Education Pamphlet That Sparked a Landmark Censorship Case

Women's rights activist Mary Ware Dennett was arrested in 1929 for mailing a booklet deemed "obscene, lewd or lascivious"

The study's authors argue that the individual may have been highly regarded due to their nonbinary status or “because they already had a distinctive or secured position in the community for other reasons; for example, by belonging to a relatively wealthy and well-connected family.”

Mysterious Iron Age Burial May Hold Remains of Elite Nonbinary Person

The Finnish grave's occupant likely had Klinefelter syndrome, meaning they were born with an extra copy of the X chromosome

#FreeBritney activists protest at Los Angeles Grand Park during a conservatorship hearing for Britney Spears on June 23, 2021 in Los Angeles.

Britney Spears and the Age-Old History of Men Policing Women's Trauma

The singer's conservatorship, on trial this month, recalls the history of hysterectomies, insane asylums, forced contraception, among others

A male masked crimson tanager displays his brilliant red and black plumage in Peru.

These Male Birds Deploy Deceptive Plumage to Win Mates

Male tanager feathers have microstructures that reflect light in ways that make their bearer look more attractive, even if he’s not the fittest bird around

A female dragon mantis with her forked pheromone gland protruding from her rear abdomen.

This Mantis Attracts Males With a Y-Shaped, Balloon-Like Pheromone Gland

Female dragon mantises attract mates in the dark by inflating a forked, translucent-green organ that researchers say also wiggles

A bearded dragon moves in for a close-up. The Australian lizards face threats from habitat loss and rising temperatures.

In a Warming World, Heat Interferes With Sex Determination in These Australian Lizards

Scientists have discovered how hot temperatures override chromosomes in bearded dragons

A statue of Charles Darwin sits in the Natural History Museum in London. The scientist's book 'Descent of Man' was published in 1871.

How Darwin's 'Descent of Man' Holds Up 150 Years After Publication

Questions still swirl around the author’s theories about sexual selection and the evolution of minds and morals

Two wood-feeding cockroaches (Salganea taiwanensis). The one on the left is missing it's wings after the mutual wing-eating behavior. The one on the right has it's wings intact.

These Cockroaches Mate for Life. Their Secret? Mutual Sexual Cannibalism

Both males and females will munch on each other’s wings after sex, a behavior that may encourage lifelong partnership

A patient holds a sample test tube for Chlamydia testing.

How Covid-19 Has Hurt the Effort to Track STDs

As gonorrhea, syphilis and chlamydia have hit their highest marks in decades, many STD contact tracers have shifted to work on the pandemic

A male wrinkle-faced bat (Centurio senex) seen dangling from his perch. Beneath his chin is a furry skin fold that he pulls up to cover the lower half of the face like a mask during courtship.

These Bats Mask Up to Woo Mates

Male wrinkle-faced bats use a furry neck flap to cover their faces while serenading the opposite sex in never-before-seen behavior

The age-of-consent campaigns of the 1880s and 1890s represent a vital yet little-known chapter in the history of suffrage.

What Raising the Age of Sexual Consent Taught Women About the Vote

Before many women could vote in the United States, they lobbied male legislators to change statutory rape laws and gained political skills in the process

The comparatively massive female anglerfish (Melanocetus johnsonii) with her tiny mate permanently fused to her belly.

Anglerfish Drop Their Immune Defenses to Find Love

Male anglerfish are major clingers. To avoid mistaking mates as foreign tissue, the deep sea couples lost part of their immune system in evolution

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