Women are more likely to want intimacy after sex, whereas men are more likely to want to drink or smoke, research finds.
Fish fossils dating to 380 million years ago provide the first physical evidence for intimate sex by copulation.
Crafty male bowerbirds fabricate staged scenes to make themselves look bigger than they really are.
Men looking to attract women on the dance floor just got a leg up from science.
Groups of male fireflies will synchronize their flashes to attract the attention of females.
If male Gulf pipefish like the mother of their brood, they develop her eggs. If not, the dads abort.
Boredom, isolation and raging hormones may all have contributed to the tragic attack by a SeaWorld killer whale.
Songbirds are changing their tune, figuratively speaking, to cope with deforestation and regrowth.