While small-scale horticulture is a relatively recent addition to the human repertoire of food provisioning, hunting has deep evolutionary roots. In practically every society, hunting ability correlates with reproductive ...
Evolution
Dec 12, 2013
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The everyday physical activities of an isolated group of forager-farmers in central Bolivia are providing valuable information about how industrialization and its associated modern amenities may impact health and wellness.
Evolution
Aug 13, 2013
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(Phys.org) —We've all heard it before: if a guy is made to feel less than manly, he'll act even more macho to make up for it. Now, new research suggests that this behavior may have something to do with how much testosterone ...
Social Sciences
Apr 17, 2013
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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
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Street lamps, traffic lights and lighting from homes are causing a rise in our night-time light levels. For some time now, scientists have suspected that artificial light in our towns and cities at night could affect plants, ...
Plants & Animals
Feb 13, 2013
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(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
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(PhysOrg.com) -- It's a rough life for the Tsimane, an isolated indigenous group in Bolivia. They make a living by hunting and foraging in forests, fishing in streams and clearing land by hand to grow crops. Their rugged ...
Other
Mar 28, 2012
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(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
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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, however, invest ...
Plants & Animals
Jan 23, 2012
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(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
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