Females have more sexual partners when they live in colder climates and are happier being monogamous when it is hotter, a study into the behavior of insects has found.
Scientists said Wednesday they had amassed the first evidence to back theories that people fall into two broad categories—promiscuity or faithfulness—when it comes to sex.
Biologists have uncovered new insights into how the male sexual behaviour of the peculiar southern bottletail squid is primed to produce the greatest number of offspring.
Female animals are unfairly sexually stereotyped by researchers, according to experts at the University of St Andrews.
Detecting sexual selection in the fossil record is not impossible, according to scientists writing in Trends in Ecology and Evolution this month, co-authored by Dr Darren Naish of the University of Southampton.
In a project led by the Max Planck Institute for Evolutionary Anthropology in Leipzig, an international team of scientists has completed the sequencing and analysis of the genome of the last great ape, the bonobo. Bonobos, ...
He risked freezing or starving to death on a doomed expedition to the South Pole 100 years ago -- but for George Murray Levick, the real horror lay in the twisted sexual mores of the Adelie penguin.
UK researchers have shown that highly sociable Australian birds, called Gouldian finches, have different personalities according to the colour of their heads.
New research from anthropologists at the University of Kent may have important ramifications for the future study of the role of colour signals in human social and sexual interactions.
In the animal world, males typically search for their female partners. The mystery is that in some species, you get a reversal -- the females search for males.