56. Who invented the first practical camera?
a) George Eastman
b) Louis Daguerre
c) William Henry Fox Talbot
d) Thomas Wedgwood
Answer: b) Louis Daguerre
57. Who discovered the circulation of blood?
a) William Harvey
b) Robert Boyle
c) Andreas Vesalius
d) Joseph Lister
Answer: a) William Harvey
58. Who invented the first successful helicopter?
a) Igor Sikorsky
b) Leonardo da Vinci
c) Frank Piasecki
d) Juan de la Cierva
Answer: a) Igor Sikorsky
59. Who discovered the laws of motion?
a) Isaac Newton
b) Galileo Galilei
c) Albert Einstein
d) Stephen Hawking
Answer: a) Isaac Newton
60. Who invented the steam engine?
a) James Watt
b) Thomas Newcomen
c) George Stephenson
d) Richard Trevithick
Answer: a) James Watt
