Wise old Montaigne was shrewd in his gray-beard wisdom and loving life, even in the midst of his fits of gout and colic.
Dr.Johnson's best work, "The Lives of the Poets," was written when he was seventy-eight.

Defoe was fifty-eight when he published "Robinson Crusoe." Newton wrote new briefs to his "Principia" at eighty-three.
Plato died writing, at eighty-one.

Tom Scott began the study of Hebrew at eighty-six.

Galileo was nearly seventy when he wrote on the laws of motion.

James Watt learned German at eighty-five.