(A) Helen Keller :
Helen Keller, who was blind and deaf, learned through finger movement and touching. She spoke through lip movement. In college, she spelled whatever was spoken on her palm to remember what she had learnt in lectures.
(B) Ts-1 :
Ts-1 is a strange vehicle which can be considered a wonder of science. It is an experimental vehicle that has a time meter. Dial the year you want to go to and the speed at which you want to travel, and the vehicle will travel back in time.