What was the U.S. stock-market crash of October 24, 1929 commonly called?
Answer
Black Thursday
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What was the U.S. stock-market crash of October 24, 1929 commonly called?
Answer
Black Thursday
In House M.D., who is Dr. Gregory House's best friend and an oncologist?
Answer
James Wilson
What water-control invention did Leonardo da Vinci design to regulate canal levels?
Answer
Canal lock
What siege weapon did Leonardo da Vinci design to hurl stones using a curved spring?
Answer
Catapult
Which Leonardo da Vinci invention was designed as a stringed keyboard instrument?
Answer
Viola organista
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In House M.D., who is Dr. Gregory House's best friend and an oncologist?
Answer
James Wilson
Which Leonardo da Vinci invention was designed as a stringed keyboard instrument?
Answer
Viola organista
What rotating machine did Leonardo da Vinci design to help polish concave mirrors?
Answer
Mirror-grinding machine
Which Leonardo da Vinci invention used 33 small-caliber guns arranged in three rows?
Answer
33-barrelled organ
What type of machine did Leonardo da Vinci design to raise heavy columns and other loads?
Answer
Revolving crane