Robert F Furchgott was showered with honours during a scientific career spanning more than 70 years.
Degrees, professorships and research papers culminated in a share of the Nobel prize for physiology or medicine in 1998.
This was for his discovery that nitric oxide would enlarge blood vessels in the body and so increase blood flow.
It provided the theoretical basis that lead eventually to the development of Viagra, and it is likely to be the reason millions of men and women around the world will remember him.
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