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Sweden

Infertility in men could point to more serious health problems later in life

OPINION: Doctors can identify men who are at risk of serious diseases after they become fathers with simple and cheap tests. It is no longer enough to just evaluate the number of sperm.

Kids with rich grandparents do better in school

Having rich grandparents can clearly make a child’s life materially easier. But now it appears that wealth may also affect a child’s grades in school.

What makes an animal clever? Research shows that intelligence is not just about using tools

The list of animals that use tools keeps growing, from chimps to birds and even octopuses. So is it time that we abandoned "tool use" as a measure of intelligence among species?

Fewer women tore when giving birth at home

Fewer women suffer perineal trauma – a tearing or needing to be snipped, when deliveries are at home instead of hospitals or clinics.

Swedish research article retracted by prestigious international journal

Science magazine, one of the top academic journals in the world, has retracted an article written by two Swedish researchers whose data and methods have been judged to be suspect by a Swedish review board.

Just one in ten children “with food allergies” actually had them

Parents had steered their offspring away from a variety of foods they thought their kids were allergic to. When researchers examined the children they found that just one in ten really had a food allergy.

Forbidden products and fit personnel make us buy more

There are all kinds of psychological factors that drive us to shop. Well-trained, muscular clerks and goods on display that we cannot touch are two such ploys that make us open our wallets and buy more costly merchandise.

Self-harm links to violence against others

Researchers behind a Swedish study do not think that self-harm leads to violent crimes. But there is an underlying association between deliberate self-harm and violent criminality.

People with children vaccinate themselves to protect their loved ones

Childless, single persons may take vaccines because they deem it important to protect vulnerable segments of society. Parents seem to be more concerned about protecting their own family.

How science can help cities prepare for attacks on metro systems

OPINION: Whatever preparations metro authorities make for disasters, they can consider their passengers to be part of their solution. They need to design the tunnel environment for the people, not the people for the environment.