Why do animals fight with members of other species? A nine-year study by UCLA biologists says the reason often has to do with "obtaining priority access to females" in the area.
It seems unnatural that a species could survive without having sex. Yet over the ages, evolution has endowed females of certain species of amphibians, reptiles and fish with the ability to clone themselves, and perpetuate ...
The females of a reclusive endangered lizard species may be increasing their chances of finding a mate by engaging in unusual behaviour which attracts males from up to 100m away.
Every year, slightly more boy babies than girl babies are born worldwide. But back when sperm meets egg, the two sexes are conceived in equal numbers, a new study suggests.
In the world of bird fashion, the guys seem to have all the fun: brighter feathers, sharper accessories, more pizzazz.
'Attractive' male birds that mate with many females aren't passing on the best genes to their offspring, according to new UCL research which found promiscuity in male birds leads to small, genetic faults in the species' genome.
Single women aren't passive when it comes to the world of dating, and neither are female spiders, according to researchers at Susquehanna University in Selinsgrove, Pa.
A genetic study of papaya sex chromosomes reveals that the hermaphrodite version of the plant, which is of most use to growers, arose as a result of human selection, most likely by the ancient Maya some 4,000 years ago.
The DNA you inherit from your parents contributes to the physical make-up of your body—whether you have blue eyes or brown, black hair or red, or are male or female. Your DNA can also influence whether you might develop ...
Female mice are attracted more strongly to the odour of healthy males than unhealthy males. This had already been shown in an earlier study by researchers from the Konrad Lorenz Institute of Ethology at the Vetmeduni Vienna. ...