New series 1/4. Happiness. Professor Robert Winston returns with the ground-breaking survey, now in its sixth year, following 25 babies born in 2000. Life is full of difficult experiences, but do biological or environmental factors keep us on an even keel?
Producer Jo Woolf ; Executive producer Tessa Livingstone Mark Lawson Talks to Robert Winston on BBC4 at 9pm Happy ever after?, plus book offer: page 23