Dr John Shepherd's discoveries have led to new ways to treat high blood pressure and have helped astronauts withstand the rigours of space travel. The 92-year-old who had suffered from Alzheimer's disease died on Tuesday at the Mayo Clinic in Rochester, Minnesota in the United States.

BBC, 10/10/11

Additional coverage: Reuters, International Business Times, EmpowerHER, MinnPost, Sun Herald (Miss.), Finanz Nachrichten, Post-Bulletin

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