We propose same-sex attraction evolved to allow greater social integration and stronger same-sex social bonds.
Scientists don't ask how some people evolved to be tall. In the same way, asking how homosexuality evolved is the wrong question. We need to ask how human sexuality evolved in all its forms.
Scientists don't just want to unravel the mysteries of slug sex for voyeurism.
A woman takes a selfie with three others while attending the Vaisakhi Parade in Surrey, B.C., on April 22, 2017.
THE CANADIAN PRESS/Darryl Dyck
Studies suggest a significant proportion of Indian-origin families in Canada are practising female feticide. It is crucial to understand how gender inequality may lead to sex selection.
The recent decriminalisation debates in Australia have included a new focus on partial restrictions on abortions – a strategy that has been very successful in many US states.
The Australian right-to-life movement is tiny compared to the US, but its recent adoption of US-style campaign strategies has given it an outsize voice in the debate here.
New evidence boosts the idea that species with males who compete for mates adapt faster to changing circumstances.
Male collared flycatcher, singing for multiple females.
Biologists investigated whether birds that search for multiple mates would evolve ever more elaborate songs to attract them. What they found might have surprised Darwin.
Why are humans the only animals with chins?
The view that sex-selective abortion is unethical is widely shared. But those who propose to use the law to prevent it need to supply a clear, compelling moral justification.
Super-black feathers on these guys are like looking into a dark cave.
Male Birds of Paradise have patches of super-black plumage that absorb 99.95 percent of light. New research identified their feathers' microscopic structures that make them look so very dark.
What do we really know about the link between a species' sex life and how it evolves?
Victorian mores influenced ideas not just about men and women but animals too.
Joseph Christian Leyendecker
Victorian attitudes influenced what scientists thought they were observing about sexual behaviors in the animal world. But modern techniques reveal the myth for what it is.
Bearded dragons can be genetically male but look like and function as females.
Arthur Georges, Institute for Applied Ecology, University of Canberra
We are only just starting to appreciate the full sexual diversity of animals.
This skull belongs to the carnivorous gorgonopsian therapsid Smilesaurus ferox which lived 255 million years ago.
Cradle of Humankind/Flickr/Wikimedia
Modern sabre-tooth mammals have their canines constantly on display. This allows them to seduce mates. But was sexual selection also an important phenomenon among our pre-mammalian ancestors?
Researchers have found the first evidence that dinosaurs grew unusual features like crests and horns as a way of attracting a mate.
The idea of ‘family balancing’ is based on the belief that children come in two genders that have essentially different traits.
The risk of harm in sex selection stems from the fact that parents don't desire any child, they want a child of a particular sex, who is to remain within the limits of binary gender roles.
Should parents be allowed to select the sex of their child through IVF when there’s no compelling medical reason to do so?
The National Health and Medical Research Council call for public submissions on whether sex selection should be allowed without a medical reason recognises changing social attitudes.
Told you so!
Photo of Charles Darwin uploaded by Shehal Joseph/Flickr
Sperm banks and human cloning may not be the future. A study in beetles reveals that having two sexes boosts genetic quality.
Gaudy appearance, cocky sashay, singing voice … peacock or Jagger?
What is it that makes rockstars so attractive to the opposite sex? Turns out Charles Darwin had it pegged hundreds of years ago – and it has a lot to do with peacocks. In The Descent of Man, and Selection…
The sexual activity of the southern bottletail squid involves choosy females eating losers’ ejaculate.
In romantic circles, reproduction is viewed as a harmonious venture between the sexes. After all, if you aim to produce the best offspring possible, wouldn’t it also be best to cooperate with your partner…
There are new insights as to how females play a significant role in determining paternity. The Syracuse University study…