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How stress can cause depression

Studies with rats and humans reveal how chronic stress can result in a depression.

Double standards for the internet hurt users

Western politicians praise the internet as a tool in the fight against authoritarian regimes – so why do they limit access to the web by registering users and censoring content?

Self-harm is not only for troubled teens

Self-inflicted cuts and burns have become such a widespread phenomenon that ordinary, otherwise well-balanced young people have started doing it. The problem is seen in both sexes to an equal degree.

Ants in supercolonies defy evolution

Some invasive ants create supercolonies which eliminate other ants in an area. But the supercolonies cannot continue to exist, since evolution doesn’t allow for this social behaviour.

China has inspired us since Enlightenment

Europe and the USA are stagnating economically, while China thunders ahead. Can we learn anything from China? New research shows the West has been inspired by China since the Age of Enlightenment.

Marine reptiles closer to extinction

The number of marine reptiles has fallen sharply in recent years and most species are now threatened with extinction. Man is the culprit, frightening the reptiles and destroying their breeding grounds, say researchers.

Vikings grew barley in Greenland

A sensational find at the bottom of an ancient rubbish heap in Greenland suggests that Vikings grew barley on the island 1,000 years ago.

Redheads feel a different kind of pain

Redheads are more sensitive to some kinds of pain and less sensitive to others. The explanation for these differences could be found in their genetic makeup.

Chimpanzees have the X factor

New research reveals how natural selection has affected the evolution of chimpanzees, and perhaps also humans. The X chromosome probably holds the answer.

Everyday chemicals impair effects of vaccines

High concentrations of so-called PFCs in children’s blood reduce the effect of vaccines, a new Faroese/Danish study shows.