test -- hope it wiggles for you and me
Professor Robert L. Foote's wigglegif of Pythagoras' proof of the right-triangle theorem (circa 550 BC). The Egyptians knew that in any right triangle
and used knotted ropes, particularly in the proportion 3:4:5 to survey and build with right angles, but they neither had a proof of it nor were they at all interested in mathematical proof. Beginning with Thales and Pythagoras, the ancient Greeks (who enthusiastically plagiarized Egyptian and Babylonian mathematics) placed Proof at the center of their mathematics, a tradition which has radiated at the core of mathematics to this day.
A bit later, U.S. President James A. Garfield discovered an original proof. It's every bit as good a proof as The Master's.
But I don't think Garfield sacrificed a herd of oxen when he discovered it. Garfield was born in 1831 and was assassinated by a disgruntled office-seeker in 1881.
As a matter of editorial policy, Vleeptron does not print the names of people who assassinate people who make positive contributions to Earth.