Brown-headed cowbirds perch together on a branch in southern Arizona. The species is a brood parasite, sneaking their eggs into other birds’ nests in an attempt to steal parental care.

A Revealing Look Into the Surprisingly Tricky Sex Lives of Birds

Even among the most durable migratory bird pairings, sexual exclusivity is rarely part of their relationship

“As the first national women’s reform organization, [the American Female Moral Reform Society] showed that there was power in women organizing to address societal problems,” says rhetorician Lisa J. Shaver.

The Daring 19th-Century Reformers Who Sought to End Prostitution by Offering Financial and Emotional Support to Urban Sex Workers

Led entirely by women, the American Female Moral Reform Society gave material aid to those in need and pushed for men to be held accountable for frequenting brothels

After a trolley conductor accused Alice Stebbins Wells of using her husband's police badge to avoid paying for public transit, the Los Angeles Police Department allowed her to wear a more feminine uniform of her own design, along with a special “Policewoman’s Badge No. 1.”

Women Who Shaped History

Armed With Just a Badge, Los Angeles’ First Policewoman Protected the City’s Most Vulnerable in the Early 20th Century

Appointed in 1910, Alice Stebbins Wells patrolled dance halls, skating rinks, penny arcades and movie theaters, keeping these public spaces free of vice and immorality

When they're alarmed, blue-lined octopuses display iridescent blue rings on their arms to ward off approaching predators.

These Male Octopuses Use Venom to Subdue Female Mates—and Avoid Being Eaten After Sex

Scientists observed male blue-lined octopuses injecting tetrodotoxin into females, which rendered them immobile for mating

Gertrud Eysoldt as Salome in a Berlin production of Oscar Wilde's notorious play, circa 1902

Why Oscar Wilde’s Play About a Biblical Temptress Was Banned From the British Stage for Decades

“Salome,” a one-act tragedy by the Irish playwright, terrified the Victorian public with its provocative depiction of a teenage girl whose lust for a man quickly morphs into bloodlust

An artistic representation of microorganisms. New research suggests sex may transfer a distinctive microbiome to a person's partner.

Couples Exchange Bacteria During Intercourse, Known as the ‘Sexome.’ It Might Help Track Down Sexual Assault Perpetrators

In a study of 12 heterosexual couples, researchers noted the presence of a partner’s genital bacteria after sex, even when the pair used a condom

The Tyrannosaurus at Spain’s Jurassic Museum of Asturias offer a speculative take on how dinosaurs mated.

Everything You Want to Know About Dinosaur Sexual Anatomy and Reproduction, From Their Genitalia to How They Laid Eggs

Paleontologists continue to find fossils that help revise our understanding of how dinosaurs did it

Works like Tissot's The Convalescent (1872), pictured here, reflect a sense of unease over a modernizing society that was sweeping women up in its fray.

These Stunning 19th-Century Artworks Reveal the Contradictions of the Modern Woman

A new exhibition spotlights James Tissot, whose paintings and prints reflected women’s ever-evolving roles in Victorian society

Early 20th-century paleontologists wondered whether the small arms of Tyrannosaurus rex were used for grasping when the dinosaurs mated.

Everything You Want to Know About the Sex Lives of Dinosaurs, From Scratching the Ground to Battling With Horns

By evaluating fossils, scientists are learning what creature features may have been used to attract mates and fight off sexual competitors

A researcher holds a juvenile queen conch. Adults can reach up to 12 inches in length.

Scientists Play Matchmaker for Beloved Sea Snails in the Florida Keys

To boost the iconic queen conch’s population, researchers are relocating the heat-stressed creatures to cooler, deeper waters to help them find mates

For some animals, romance goes more smoothly when it comes with gifts.

When It Comes to Romantic Gift-Giving, Humans Aren’t Alone. Snails, Birds and Flies All Woo Each Other With Presents

Throughout the animal kingdom, sweethearts bestow offerings with their amorous advances

Earthwork Portrait of Genghis Khan

New Research

Move Over, Genghis Khan. Many Other Men Left Huge Genetic Legacies

A 2015 study showed that ten other men have a lot of descendants. The paper is just one of several genetic studies revealing the secrets of descent

Bufoceratias wedli, a deep-sea anglerfish

Bizarre Sex Helped Anglerfish Diversify and Dominate the Deep Sea, Study Suggests

Some of these fish perform obligate parasitism, in which males attach to—and then fuse bodies with—the much-larger females

Beachcombers stumbled upon the fish south of Cannon Beach, a small coastal town in northwest Oregon.

Beachcombers Discover Rare, Deep-Sea Anglerfish Washed Up on Oregon Coast

Most humans will never see a Pacific footballfish, as the creatures live at depths of 2,000 to 3,300 feet below the ocean’s surface

Julianne Moore as Mary Villiers and Nicholas Galitzine as her son George Villiers in "Mary & George"

The Real Story Behind ‘Mary & George’

The new mini-series dramatizes the Villiers family’s scandalous rise to power at the court of England’s James I

Heterodoxy's illustrious members included (clockwise from top right) Marie Jenney Howe, Susan Glaspell, Crystal Eastman, Rose Pastor Stokes, Doris Stevens, Charlotte Perkins Gilman and Rheta Childe Dorr.

Women Who Shaped History

The All-Woman Secret Society That Paved the Way for Modern Feminism

Based in Greenwich Village, Heterodoxy had just one requirement for membership: An applicant must “not be orthodox in her opinion”

The otherworldly form of the octopus has inspired millennia of fear and awe from humans.

Ten Wild Facts About Octopuses: They Have Three Hearts, Big Brains and Blue Blood

These bizarre creatures have been around for hundreds of millions of years, and for humans, they’ve inspired horror, admiration and culinary prestige

Maui-based photographers Lyle Krannichfeld and Brandi Romano spent about 30 minutes observing and photographing two male humpback whales on January 19, 2022.

These Photos Are the First to Show Humpback Whales Mating—and Both Are Males

Photographers spotted the interaction in the Pacific Ocean off the coast of Maui in 2022

Charlotte, a round stingray, was determined to be pregnant, despite not having a male ray companion for at least eight years.

A Female Stingray That Hasn’t Had a Mate in Eight Years Is Mysteriously Pregnant. Is a Shark the Father?

Though the round stingray, named Charlotte, shares her aquarium tank with two male sharks, experts say it is impossible for a shark to impregnate a ray

The 23 pairs of human chromosomes. People who inherit two tall X chromosomes (bottom right) are much more susceptible to autoimmune diseases than people with one X and one short Y chromosome.

Why Do Women Get More Autoimmune Diseases? Study of Mice Hints at Answers

Four in five people with an autoimmune disease are women. New research points to an RNA molecule involved in silencing one of their X chromosomes as a potential culprit

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