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Men and women have such different personalities they really could be from Mars and Venus, research has shown.

A new psychological study of more than 10,000 people revealed "striking" gender differences, especially in areas such as sensitivity and dominance.

The findings suggest previous studies have "consistently underestimated" the way personality divides men and women, say the authors.

Making friends and being popular may boil down to the size of your forebrain, a study suggests.

Scientists found an association between the size of the orbital frontal cortex - the part of the brain just above the eyes - and the number of friends a person has.

The region is one of the most highly evolved areas of the human brain. It is known to be crucial to social skills and the ability to "mentalise", or guess what other people are thinking.

Brain scans revealed that volunteers with the largest numbers of friends also had the largest orbital frontal cortex.

But if you're short, you're a little ahead of the game!

Male sex drive is at the root of most conflict in the world, from football violence to world wars, scientists have claimed.

A review of psychological evidence concludes that men are shaped by evolution to be aggressive towards "outsiders".

The tendency, at the heart of all inter-tribal violence, emerged through natural selection as a result of competition for mates.

Press photographers influence the public's perception of politicians and women simply by changing their camera angles, research has shown.

Shooting a picture from below makes a person appear more dominant and powerful, while the reverse is true for an image taken looking down from above.

A study found that powerful individuals are consistently more likely to be portrayed from below.

Competitive human sprinters are built like cheetahs and greyhounds, a study has found.

Bones in the front portion of their feet are longer than those of non-sprinters, research has shown.

Their ankle joints also rotate differently due to a shorter plantarflexor moment arm (pfMA), a measurement of leverage.

Similar characteristics are found in the world's fastest sprinting animals, such as the cheetah and greyhound.

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Imaging and other aspects of neuroscience could also be used in future to assess the public risk posed by convicted criminals, a report suggests.

But the Royal Society said any question of using brain test results as evidence in court should be approached with "great caution".

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Being hairy helps prevent you being bothered by biting insects, research suggests.

Hair makes it harder for blood-sucking bugs to feed, according to scientists. It also increases the chances of them being felt on the skin and swatted away.

Scientists studied 29 volunteers who had one arm shaved before hungry bed bugs were placed on their skin.

The results of the experiment showed that people with more hair - both longer hairs and fine, almost invisible "vellus" hairs - were more protected.

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Researchers who followed a group of trainee taxi drivers found that gaining "the Knowledge" can alter brain structure.

But this only occurred in those who successfully qualified after spending up to four years memorising London's 25,000 streets and myriad landmarks.

Some people may need more sleep than others because they carry a certain gene variant, scientists have discovered.

The study found that those with a variation of the gene ABCC9 need almost 30 minutes more sleep each night than those who do not have it.

One in five Europeans carry a variant of ABCC9, which is involved in sensing energy levels of cells in the body.