Sex

A male houbara bustard putting on an infinitely sexy "booming" display to impress the ladies.

Old Male Bustards Have Less Desirable Sperm

Male birds don’t just lose their female-wooing prowess as they age, but also their ability to sire healthy chicks

Earthwork Portrait of Genghis Khan

Ten Other Men Left Genetic Legacies So Huge They Rival Genghis Khan's

A new study shows that 10 other men founded large Y-chromosome lineages

Journey back to the Paris of the Marquis de Sade by strolling around the Marais, one of the city's oldest neighborhoods.

Tour Paris With the Marquis de Sade as Your Guide

Traces still remain in the City of Love of the famed author and sex icon

Dumpling squid don't let danger stop them from mating.

Threat of Being Eaten Doesn’t Deter Dumpling Squid From Sex

The adorable cephalopods seem to rate mating higher on their list of priorities than survival

When Sperm Meets Egg, Zinc Sparks Fly

Billions of tiny zinc particles explode from the surface of mammalian eggs when a sperm cell touches down

Antarctic Seals Keep Trying to Have Sex With Penguins

This isn’t the first time a fur seal has attempted to copulate with a king penguin and scientists think that more seals are learning the behavior

These are a pretty good idea regardless.

Scientists Are Pretty Sure Survivors Can't Transmit Ebola Sexually

Research suggests Ebola survivors aren't infectious, but scientists aren't ruling it out

A shrine marking London's Cross Bones Graveyard.

The London Graveyard That’s Become a Memorial for the City’s Seedier Past

Thousands of bodies from London’s first red light district are buried beneath a lot in the South Bank, an area under massive redevelopment

An artist's impression of an antiarch mating scene.

A Very Ancient Group of Jawed Fish Were Having Surprisingly Intimate Intercourse

Many fish later ditched this clumsy method in favor of external fertilization

Matt Dean (left) and Jim Dines (right) analyzed pelvic bones of whales and dolphins from 29 different species.

Promiscuous Whales Make Good Use of Their Pelvises

Hips don’t lie: Whale pelvic bones are not vestigial but instead evolved to help the marine mammals maneuver better during sex

Approximately a Third of Americans Have Been the Victim of Sexual Violence

The CDC's latest rape and sexual violence statistics are just as disturbing as ever

Lady Worms, Beware: Pick the Wrong Mate, End Up Dead

Sperm from the wrong species of worm will eat through a female worm's innards

These Sexy Geckos are Lost in Space

These lizards have been accidentally left to fornicate all alone among the stars

This Tiny Implant Could Provide Remote-Control Birth Control for 16 Years at a Time

Microchip implants under the skin could last for 16 years

Some World Cup Teams Ban Sex Before Games, Even Though Science Says It May Help Performance on the Field

Other teams, however, are all in favor of pre-game sex

Female Pigs Respond Differently to Batches of Sperm Carrying Mostly X Or Mostly Y Chromosomes

In an experiment, mother pigs' gene expression changed depending on the sperm type they were fertilized wtih

The sperm cells were found in Riversleigh, a remote spot in northwestern Australia that was once a teeming rainforest.

Giant Sperm Cells Belonging to 17 Million Year Old Shrimp Are the Oldest Ever Found

The sperm were longer than the male shrimp's entire body

An overly alluring research subject.

Biologists Are Biased Toward Penises

Researchers interested in the evolution of animal genitalia tend to focus on the male side of that equation, often unjustifiably ignoring the female

Female on top: A female Neotrogla insect mates with a male in a cave in eastern Brazil.

In This Community of Brazilian Cave Insects, Females Wear the Penises, Literally

A genus of insect that inhabits caves in eastern Brazil has reversed sex organs, say scientists

What "Peak Beard" Says About Human Sexual Selection

Being sexy means standing out

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