Extra testosterone reduces your empathy

A new study from Utrecht and Cambridge Universities has for the first time found that an administration of testosterone under the tongue in volunteers negatively affects a person’s ability to ‘mind read’, an indication of empathy. The findings are …

Learning causes structural changes in affected neurons

When a laboratory rat learns how to reach for and grab a food pellet — a pretty complex and unnatural act for a rodent — the acquired knowledge significantly alters the structure of the specific brain cells involved, which sprout a whopping …

Evolution by mistake

Charles Darwin based his groundbreaking theory of natural selection on the realization that genetic variation among organisms is the key to evolution.
Some individuals are better adapted to a given environment than others, making them more l…

How do you cut a nanotube? Lots of compression

PROVIDENCE, R.I. [Brown University] — A pipefitter knows how to make an exact cut on a metal rod. But it’s far harder to imagine getting a precise cut on a carbon nanotube, with a diameter 1/50,000th the thickness of a human hair.
In a pape…

Multiple fathers prevalent in Amazonian cultures

COLUMBIA, Mo. — In modern culture, it is not considered socially acceptable for married people to have extramarital sexual partners. However, in some Amazonian cultures, extramarital sexual affairs were common, and people believed that when a woma…

New fossil suggests dinosaurs not so fierce after all

A new species of dinosaur discovered in Arizona suggests dinosaurs did not spread throughout the world by overpowering other species, but by taking advantage of a natural catastrophe that wiped out their competitors.
The new dinosaur, named Sarahs…

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