Dr Gill Samuels headed the research team at Pfizer pharmaceutical and made the breakthrough in discovering the role of the chemical, sildenafil citrate, in the anatomy of male sexual preformance. Sildenafil citrate already had a medical role in the treatment of pulmonary hypertension.

She can be credited with the discovery of this additonal property of sildenafil citrate, but only as part of the overall team that 'invented viagra'. Pfizer was founded in the US and has it's corporate headquarters in the US.

"Official" toilet paper - that is, paper which was produced specifically for the purpose - dates back at least to the late 14th Century, when Chinese emperors ordered it in 2-foot x 3-foot sheets. I suppose the English may have come up with the same idea a few centuries later--stranger things have happened--and produced it in rolls resembling papyrus scrolls--another british invention, I suppose? Clever as monkeys, those English.

In our age, Joseph Gayetty invented toilet paper in 1857. His new toilet paper was composed of flat sheets. Before Gayetty's invention, people tore pages out of mail order catalogs - before catalogs were common, leaves were used. Unfortunately, Gayetty's invention failed. Was Gayetty English? Possibly. Walter Alcock (of Great Britain) later developed toilet paper on a roll (instead of in flat sheets). Again, the invention failed. I guess the English are too married to the past to accept such a useful invention. The English invented TP on a roll--I give you that. Then failed to use it.

In 1867, Thomas, Edward and Clarence Scott (brothers from Philadelphia, Pennsylvania, USA) were successful at marketing toilet paper that consisted of a small roll of perforated paper . They sold their new toilet paper from a push cart - this was the beginning of the Scott Paper Company.

In 1942, (yes that's NINETEEN-forty-two) St. Andrew's Paper Mill in Great Britain introduced two-ply toilet paper, another stunning achievement, and worthy of a hearty chorus of Rule Brittania.