Sex

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).

Based on a True Story

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.”

New Research

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.

New Research

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.

New Research

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.

Covid-19

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.

New Research

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.

100 Years of Women at the Ballot Box

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.

New Research

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

A male lemur with clearly visible scent glands on its wrists.

For Male Lemurs, Love Stinks—and Scientists Now Know Why

A newly identified trio of chemicals may help the primates find a mate

Archaeologist Kate Kolwicz examines fragments of late 19th-century Chinese pottery unearthed in downtown Missoula.

Remnants of a 19th-Century Red-Light District and Chinatown Unearthed in Montana

A trove of artifacts reveals the town of Missoula's remarkable and diverse past

John Addington Symonds, whose 1873 essay "A Problem in Greek Ethics" helped lay the foundation for the modern gay rights movement

Cool Finds

Researchers Recover an Early Copy of a 19th-Century Gay Rights Essay

This once-lost copy of "A Problem in Greek Ethics" is only the sixth of its kind

Sandro Botticelli's "Birth of Venus" finds its subject striking a contrapposto pose

New Research

Why Viewers Are Drawn to Renaissance Artists' Go-To Pose

A new study finds that the contrapposto stance reduces the waist-to-hip ratio, an attribute popularly associated with attractiveness

Female (left) and male (right) black widow spiders

Male Black Widow Spiders Find Potential Mates by Following Other Suitors’ Trails

Although this strategy may seem counterintuitive, researchers say speedy tracking is an important factor in successful courtship

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