Bone of contention

(Photograph) - Bone of contention: half a pint of milk a day keeps the doctor away, or so believe researchers at Sheffield University's centre for human nutrition. They have completed an 18-month study with help from local schoolgirls to see whether additional calcium in teenage years affects the strength of bones. Hollie Parker, 11, took part in the survey where a special x-ray machine was used to measure bone density.