Pre-birth exposure to high levels of the male sex hormone testosterone has already been shown to confer evolutionary advantages for men: strength of sex drive, sperm count, cardiovascular efficiency and spatial awareness, ...
Evolution
Apr 8, 2015
0
2030
Today the Royal Society launches a new open access, objective peer reviewed journal, Royal Society Open Science. In one of the studies published in the new journal, scientists add complexity to an accepted hypothesis of how ...
Plants & Animals
Sep 24, 2014
2
0
For the male canary, the ability to sing a pitch-perfect song is critical to wooing female canaries. As the seasons change, so does song quality and frequency. The hormone testosterone plays a role in this changing song behavior.
Plants & Animals
Dec 30, 2013
0
0
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". Researchers ...
Plants & Animals
Apr 5, 2013
6
0
(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 been little evidence ...
Plants & Animals
Oct 31, 2012
0
0
(PhysOrg.com) -- Men with strong immune systems are most attractive to members of the opposite sex according to a new study from the University of Abertay Dundee and partners.
Social Sciences
Feb 23, 2012
0
0
(PhysOrg.com) -- In many bird species males have a more elaborate plumage than females. This elaborate plumage is often used to signal body condition, to intimidate rivals or to attract potential mates. In many cases plumage ...
Plants & Animals
Oct 21, 2011
0
0
(PhysOrg.com) -- The size of the black breast bib - the badge - and bill colour of male House Sparrows change over the course of the year. Such ornaments usually signal quality and dominance of a male to his conspecifics ...
Plants & Animals
Jun 4, 2010
0
0
Territorial behavior in male mice might be linked to more "girl-power" than ever suspected, according to new findings at UCSF. For the first time, researchers have identified networks of nerve cells in the brain that are ...
Plants & Animals
Oct 1, 2009
1
0
