Dr Gillian Samuels, chemist and erectile dysfunction therapist, has largely been credited with the invention of the wonder drug which we now know as Viagra. It was a long and tedious path though, spanning some 25 years of cumulative study and labwork. The real breakthough came though on a bleak September day in 1995 when she decided to cross an owl and a rooster............when the results came through, she was overjoyed to have a cock which stayed up all night
