Biologists Turn Back the Clock to Understand Evolution of Sex Differences
Published: May 3, 2012.
Released by McGill University
Sex differences account for some of the most of the spectacular traits in nature: the wild colours of male guppies, the plumage of peacocks, tusks on walruses and antlers on moose. Sexual conflict – the battle between males and females over mating – is thought to be a particularly potent force in driving the evolution traits that differ in males and females.
Full Story »
More news from McGill University
Blame It on Your Brain: Salt And Hypertension
An international research team led by scientists at McGill University has found that excessive salt intake "reprograms" the brain, interfering with a natural safety mechanism that normally prevents the body's arterial blood pressure from rising.
Current Nutrition Labeling Is Hard to Digest
Current government-mandated nutrition labeling is ineffective in improving nutrition, but there is a better system available, according to a study by McGill University researchers published in the December issue of the Annals of the New York Academy of Sciences.
The Secret of Empathy
The ability to express empathy -- the capacity to share and feel another's emotions -- is limited by the stress of being around strangers, according to a new study published today in the journal Current Biology.
Nearly Half the Systems Crucial to Stability of Planet Compromised
Almost half of the processes that are crucial to maintaining the stability of the planet have become dangerously compromised by human activity. That is the view of an international team of 18 researchers who provide new evidence of significant changes in four of the nine systems which regulate the resilience of the Earth. One of the systems which has been seriously affected is the nitrogen-phosphorus cycle which is essential to all life, and is particularly important to both food production and the maintenance
New Strains of Parasites Identified
About 600 million people around the world live with whipworms. Most are children in the developing world, whose physical and mental development is stunted by these gastrointestinal parasites. The whipworms affect their ability to learn and therefore have a long-term impact on the social and economic situations of some of the world's poorest people. Although the whipworm species Trichuris trichiura is known to inhabit both non-human primates and humans, little is known about the parasite. Indeed, until a recent study by Ria Ghai,
Social Equity in Urban Transportation Planning
During the 20th century, urban transportation planning in North America was mainly concerned with easing traffic congestion, improving safety and saving time for motorists. These days, most cities' transportation plans evoke a more complex blend of environmental, economic, and social-equity goals - all aimed at promoting "sustainability." Yet, many fail to include meaningful measurements of social-equity objectives, such as helping disadvantaged neighborhoods access essential services, according to researchers at McGill University.
Music Cuts Across Cultures
Whether you are a Pygmy in the Congolese rainforest or a hipster in downtown Montreal, certain aspects of music will touch you in exactly the same ways. A team of researchers from McGill, Technische Universität Berlin, and the University of Montreal arrived at this conclusion after travelling deep into the rainforest to play music to a very isolated group of people, the Mbenzélé Pygmies, who live without access to radio, television or electricity. They then compared how the Mbenzélé responded both to their
Better Dam Planning Strategies
When dams are built they have an impact not only on the flow of water in the river, but also on the people who live downstream and on the surrounding ecosystems. By placing data from close to 6,500 existing large dams on a highly precise map of the world's rivers, an international team led by McGill University researchers has created a new method to estimate the global impacts of dams on river flow and fragmentation.