Sex is extra strange if you're a shroom.
Bill Nye The Science Guy speculates on the future of mankind
When different species of worms mate, it doesn't end well.
What some squirrel-sized hermaphrodite robots can tell us about evolution
Just add in a speaker and a uh, condom, and you're good to do some science
Get the bees'-eye view.
Science solves a mystery that's more than 50 years old.
Due to its peculiar lifestyle and mating habits, the larger Pacific striped octopus has been largely ignored by scientists. It doesn't even have a Latin name.
Guess the species (either common or Linnaean) by tweeting at us--we're @PopSci--and get your name listed right here! Plus eternal glory, obviously. Update: We have a winner!
Epigenetic molecules that regulate genes may influence homosexuality.
Or are they just curious?
Researchers test sexual adaptations in time-traveling brine shrimp
Opposite-sex partners: can't live with 'em, can't evolve without 'em
Popular Science talks to Isabella Rossellini about her new series of sexy science films
New research says our immune systems dictate attraction
Meet the extraordinary scientists whose innovations are bringing us robot cars, new cures and vaccines, the fastest-ever computer animations, and much, much more
Research shows that mixed-gender porn stimulates sperm to swim faster than all-women porn.
The crazy critters astound us once again
If you cheat on your spouse, you can't yet plead biochemistry in divorce court. But rodent-brain research sheds light on why some lovers stay, some stray.
Animal behavior: Male G. cancriformis spiders prefer to mate with virgins.