Thomas Alva Edison suffered early from deafness and taught his wife-to-be Morse code while he was courting her. When she was able both to send and receive messages, Edison proposed to her by tapping out the message in her hand. She answered in the same way. After they were married, they often "spoke" to each other in Morse code.
A long career of being always right made it impossible for Thomas Edison to endure being wrong. Committed thoroughly to the use of direct electrical current, Edison unscrupulously fought the use of alternating current. He lobbied New York State into adopting A.C. for its newly devised electric chair (and A.C. is indeed more efficient in electricution than direct current), and then he pointed with great horror to the electric chair as an example of the deadly nature of A.C.
Thomas Edison, though still in possession of his sight, found Braille preferable to visual reading.
Edison, like Isaac Newton, Da Vinci and Albert Einstein, was vegetarian.
"Nonviolence leads to the highest ethics, which is the goal of all
evolution. Until we stop harming all other living beings, we are still
savages." ~Thomas Edison
