Why an owl can swivel its head (and why you should avoid chiropractors)

If you or I tried to swivel our head round by 270 degrees, we'd cut off the blood supply to our brains and pass out - or worse. But owls manage it: and now scientists have worked out how.

HPV blamed for cancer spike in men

Doctors have confirmed a significant increase in the rate of head, neck and throat cancers linked to HPV - in men.