For many fish species today, copulation is a hands-off affair. Females release a torrent of eggs into the water, and males douse the eggs in a cloud of sperm. This seems like a pretty basic way of ...

University of California, Berkeley, herpetologist Jim McGuire was slogging through the rain forests of Indonesia's Sulawesi Island one night this past summer when he grabbed what he thought was a male ...

The history of sex may have to be rewritten thanks to a group of unsightly, long-extinct fish called placoderms. A careful study of fossils of these armour-plated creatures, which gave rise to all ...

Sex is an ancient tradition. It’s older than today’s continents, older than dinosaurs, older than trees, dating back to a time when vertebrate life thrived in the seas but had not yet ventured onto ...

Evidence of bony organs in ancient, armour-plated fish suggests that they copulated even though many of their descendants stopped doing so. The history of sex may have to be rewritten thanks to a ...