Inventions and Discoveries

46. Who invented the steam engine?
a) James Watt
b) Thomas Newcomen
c) George Stephenson
d) Robert Fulton

47. Who discovered the law of electromagnetism?
a) James Clerk Maxwell
b) Michael Faraday
c) Albert Einstein
d) Niels Bohr

48. Who invented the first successful heart transplant?
a) Christiaan Barnard
b) Joseph Murray
c) Norman Shumway
d) Denton Cooley

49. Who discovered the law of gravitation?
a) Isaac Newton
b) Galileo Galilei
c) Albert Einstein
d) Stephen Hawking

50. Who invented the telephone?
a) Alexander Graham Bell
b) Elisha Gray
c) Antonio Meucci
d) Thomas Edison