Using almost every type of telescope known to humankind, Prof Marscher believes he has worked out where and how the jets - or blazars - are formed.

BBC: Black holes reveal more secrets

Prof Chapman says that these disaffected youngsters are from the type of families of skilled workers who might have had more optimistic expectations in the 1970s and 1980s.

BBC: 'Angry young men' lack optimism

"We would expect that to lead to more people getting acupuncture, but given there is good evidence to show this is effective for the prevention of both tension-type and migraine-type headaches then that is a good thing because people are getting access to an effective treatment, " Prof Martin Underwood said.

BBC: Painkillers 'are the cause' of millions of headaches