Doing it to death: Suicidal sex in 'marsupial mice'
Imagine if you only had one shot at passing on your genes before you died. It happens more often in the natural world than you might expect: suicidal reproduction – where one or both sexes of a species ...
Sperm wars: Evolutionary biologist compiles international special issue on sperm competition
Why do male animals need millions of sperms every day in order to reproduce? And why are there two sexes anyway? These and related questions are the topic of the latest issue of the research journal Molecular Hu ...
Poor ranking on international test misleading about US student performance, researcher finds
(Phys.org)—A comprehensive analysis of international tests by Stanford and the Economic Policy Institute shows that U.S. schools aren't being outpaced by international competition.
Females fight back in sperm wars
(Phys.org) —Females exposed to a risk of sperm competition have been found to produce more defensive ova compared to the eggs of females reared under no risk of sperm competition, according to researchers ...
Biologists confirm role of sperm competition in formation of new species
Female promiscuity—something that occurs in a majority of species, including humans—results in the ejaculates from two or more males overlapping within her reproductive tract. When this happens, sperm ...
Monogamy reduces major social problems of polygamist cultures: study
In cultures that permit men to take multiple wives, the intra-sexual competition that occurs causes greater levels of crime, violence, poverty and gender inequality than in societies that institutionalize and practice monogamous ...
German bank reports solar power cost in India and Italy has reached grid parity
Microsoft will be fined over browser commitment: EU (Update)
US software giant Microsoft faces yet more heavy fines after it promised to offer clients a choice of web browser but has failed to do so, the EU's competition commissioner said Monday.
Toyota, BMW working on new battery technology
Toyota Motor Corp. and BMW Group are working together on next-generation batteries for green vehicles called "lithium-air" as their collaboration, first announced in late 2011, moves ahead in fuel cells, ...
Consumerism and its antisocial effects can be turned on -- or off
Money doesn't buy happiness. Neither does materialism: Research shows that people who place a high value on wealth, status, and stuff are more depressed and anxious and less sociable than those who do not. Now new research ...
Study of salmon sperm success shows need for speed
(Phys.org) —When salmon spawn, males competing to fertilise eggs will win or lose based primarily on their sperm swimming speed, according to a collaborative study by researchers from the University of ...
Study brings greater clarity to sex roles
Glossy magazines and TV reality shows often portray males as the gender that strays and females as the gender that's picky.
Gender gap disappears in school math competitions, study shows
The idea that boys are better at math and in competitions has persisted for a long time, and now we know why: Nobody bothered to schedule the rematch.
Big sperm don't always win the race
When females mate with more than one male, each one's sperm has to compete to get to her eggs. Until now, researchers had thought the fastest sperm would dominate.