Power struggles are best kept out of the public eye
For animals, prevailing in a fight affects their likelihood of winning future conflicts. The opposite is true of losing a fight. The sex hormone testosterone is often believed to mediate this "winner effect". ...
Adolescent male chimps in large community strive to be alphas
(Phys.org)—An Ohio University anthropologist reports the first observation of dominance relationships among adolescent male chimpanzees, which he attributes to the composition of their community.
Scientists reveal genetic mutation depicted in van Gogh's sunflower paintings
In addition to being among his most vibrant and celebrated works, Vincent van Gogh's series of sunflower paintings also depict a mutation whose genetic basis has, until now, been a bit of a mystery.
Google faces moment of truth on monopoly probe
Google faces a moment of truth in the coming weeks over a lengthy US probe into potential abuse of its Internet search dominance, amid regulatory woes on both sides of the Atlantic.
Meerkats' sinister side is secret to their success, study shows
The darker side of meerkats – which sees them prevent their daughters from breeding, and kill their grandchildren – is explained in a new study.
In bonobos, attractive females are more likely to win conflicts against males
Female social dominance over males is rare among mammal species. Bonobos, one of our closest living relatives, are known for females holding relatively high social statuses when compared to males; though ...
Orangutans plan their future route and communicate it to others, researchers show
Male orangutans plan their travel route up to one day in advance and communicate it to other members of their species. In order to attract females and repel male rivals, they call in the direction in which ...
Lefty or Righty? A new hold on how we think
(PhysOrg.com) -- Whether you’re a lefty or righty, chances are you never thought your dominant hand played a role in the decisions you make. But what may seem as an unimportant trait might actually influence ...
Researchers find gender bias in sexual cannibalism papers
Mongooses synchronize births to escape despotic females
Some mammals may have evolved to synchronise births as a way of evading the threat of infanticide, according to a study led by the University of Exeter.
The maternal effect: How mother deer protect their future kings
(Phys.org) —Do mothers invest more care in their sons if they believe their child is destined to be a king, president or a high-powered leader?
Bonobos' unusual success story
Mate competition by males over females is common in many animal species. During mating season male testosterone levels rise, resulting in an increase in aggressive behavior and masculine features. Male bonobos, ...
Testosterone regulates solo song of tropical birds
(Phys.org)—In male songbirds of the temperate zone, the concentration of sex hormones is rising in spring, which leads to an increase in song activity during the breeding season. In the tropics, there has ...
Google's 4Q lobbying bill triples to $3.76 million
Google's U.S. lobbying bill more than tripled to $3.76 million in the fourth quarter as the Internet search leader fought proposed changes to online piracy laws and sought to influence a wide range of other issues that could ...