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Sweden

Birdsong is genetically coded

Nature or nurture? Until now, ornithologists assumed that birds passed on their unique songs predominantly via social learning. But a new Swedish study shows that genetics may be a bigger factor.

Races are the latest housewife holidays

Some women literally run away from their families. At least for a day or two.

Breaking through brain’s defence to let in meds

The mystical blood-brain barrier protects the brain like a sentry, making it difficult to get through with vital life-saving medications. Uppsala Professor Christer Betsholtz is trying to find the key needed to enter.

Could asteroids bombard the Earth to cause a mass extinction in 10 million years?

Are showers of asteroids to blame for regular extinction events? If so, we might be able to predict and even prevent asteroids causing mass extinctions in the future.

How writers handle rejections

Some burn the rejection slips; others see this as an opportunity to try something utterly new.

Electric bikes score well in head injury test

Swedish researchers have used crash-test dummies to determine whether head injuries from accidents vary according to bicycles types.

What happens to girls and boys in gender-neutral preschools?

In some Swedish preschool programs, the children are addressed with a recently coined gender-neutral pronoun rather than as she or he. Researchers have now investigated whether this practice makes the children more untraditional.

Researchers don’t really know what prevents predator attacks

A review of a host of research papers has failed to find any scientific proof that electric fences are protecting sheep against large predators.

Big trees a threat to popular berries

The trees in Swedish forests are growing taller and denser through forestry practices but their growth comes at the expense of bilberry and lingonberry forest floor vegetation. Should pickers start worrying?

How do you talk to people about your HIV diagnosis?

People with HIV often wonder when and how they should talk about their diagnosis, Swedish research shows. They fear that people will pull away if they are open about their disease.