NEW HAVEN, CT - At the age of six months babies can barely sit up - let along take their first tottering steps, crawl or talk.

But, according to psychologists, they have already developed a sense of moral code - and can tell the difference between good and evil.

An astonishing series of experiments is challenging the views of many psychologists and social scientists that human beings are born as 'blank slates' - and that our morality is shaped by our parents and experiences.

Instead, they suggest that the difference between good and bad may be hardwired into the brain at birth.

In one experiment involving puppets, babies aged six months old showed a strong preference to 'good' helpful characters - and rejected unhelpful, 'naughty' ones.

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