Nipple size varies markedly from woman to woman, whereas male nipples are more uniform. This finding goes against a common assumption of evolutionary biology, say Ashleigh Kelly and her colleagues from the University of Queensland in Australia in a study published in Springer’s journal Adaptive Human Behavior and Physiology. A major goal in evolutionary biology has been to...
Women under 40 seeking a partner online are more particular than men, especially when it comes to education, according to a QUT study into the online dating behavior of more than 41,000 Australians. “Do men and women know what they want? Sex differences in educational preference” by QUT behavioral economists Dr. Stephen Whyte, Dr. Ho Fai...
A preference for male children persists among second-generation mothers of South Asian descent, according to new study that found a skewed ratio of male-to-female babies born to these women in Ontario. The findings, published today in the Journal of Epidemiology and Community Health, came from the same group of researchers who reported in 2016 that more...
Black Americans are nearly three times more likely to be killed by police than their white counterparts, with even larger disparities among those who are unarmed. The trend is also harming the mental health of the black community, according to new research published in The Lancet from the Perelman School of Medicine at the University of Pennsylvania...
New research warns that the normalisation of ‘plus-size’ body shapes may be leading to an increasing number of people underestimating their weight – undermining efforts to tackle England’s ever-growing obesity problem. While attempts to reduce stigmatisation of larger body sizes – for example with the launch of plus-size clothing ranges – help promote body positivity,...
A scientist at Duke University says the natural evolution of social organizations into larger and more complex communities that exhibit distinct hierarchies can be predicted from the same law of physics that gives rise to tree branches and river deltas. In a paper published June 15 in the International Journal of Energy Research, Adrian Bejan outlines...
This month Saudi Arabia will put an end to its ban on women driving, opening the way for millions of new drivers to navigate a country three times bigger than Texas. While the policy shift provides relief to women who lacked freedom of mobility, the long-term effects of ending the ban are far from clear...
A quarter of the seafood tested from Metro Vancouver grocery stores, restaurants and sushi bars is not what you think it is. A new UBC study used DNA barcoding to determine that 70 of 281 seafood samples collected in Metro Vancouver between September 2017 and February 2018 were mislabelled. Researchers from UBC’s Lu Food Safety...
Cannabis use may be decreasing among teens, but a new study by researchers at Columbia University’s Mailman School of Public Health showed that American adults have increasingly used cannabis daily since 2007. The findings are published online in the Journal of Studies on Alcohol and Drugs. The legal status of cannabis for medicinal and recreational use...
Health impacts of neonicotinoids may go well beyond bees, according to a new University of Guelph study. U of G researchers found residues of the insecticides in the livers of wild turkeys, providing evidence that this common agrochemical is being ingested by free-ranging animals. The researchers from the Ontario Veterinary College are among the first to...