Testicles 'are stem cell source'

Cancer spread 'happens earlier'
Apparently "normal" cells may carry cancer to new sites long before a tumour develops, scientists say.

Lab boost for spinal injury rehab
A chemical used by bacteria to invade other cells may aid rehabilitation from spinal and brain injury, research suggests.

Retinal transplant boosts vision
An experimental transplant of cells into the eyes of patients with failing sight improved vision in most of them, US researchers say.

Clone cell cancer 'cure' hailed
Scientists claim they have cured advanced skin cancer for the first time using the patient's own cells cloned outside the body.

Fat cell numbers 'set for life'
No amount of dieting will alter the number of fat-hoarding cells in our bodies, research has suggested.