[Answer] 4. Born in New York City in 1914, this gentleman had planned to study law, but a science class so intrigued him that he devoted his life to it. Who went on to give the world a polio vaccine in 1955?

Step 1 : Introduction to the question "4. Born in New York City in 1914, this gentleman had planned to study law, but a science class so intrigued him that he devoted his life to it. Who went on to give the world a polio vaccine in 1955?"

...1. Sergei Kominski 2. Jonas Salk 3. Louis Mercator 4. Eric von Leeuwenhoek Salk enrolled in City College at the age of fifteen and turned his attention to science and medicine. He later studied at N.Y.U.(New York University) medical school and spent eight years of pursuing a vaccine for polio. When he thought he had found it, he tested it on himself and his children. As it was successful, he announced its release in 1955. He subsequently received many awards, among them the Congressional Medal Of Honor for distinguished achievement. He also worked as a consultant for WHO (World Health Organisation), and later set up the Salk Institute for cancer research in La Jolla, CA.

[Answer] 5. The Archduke of Austria ______________________ was assassinated on June 28, 1914. This was the "spark" that started the war.

Step 1 : Introduction to the question "5. The Archduke of Austria ______________________ was assassinated on June 28, 1914. This was the "spark" that started the war."

...1. Samuel Lemar 2. Sergei Hunera 3. Franz Ferdinand 4. Adolf Hitler It was on June 28, 1914, in the town of Sarajevo. The three Black Hand assassins at Savajevo were all teenagers suffering from tuberculosis.

At what intersection was the world's first electric traffic signal installed in 1914?

Step 1 : Introduction to the question "At what intersection was the world's first electric traffic signal installed in 1914? "

The world's first, manually operated gas-lit traffic signal was short lived. Installed in London in December 1868, it exploded less than a month later, injuring or killing its policeman operator