Answer: Cold War
In October 1962, the Soviet provision of ballistic missiles to Cuba led to the most dangerous Cold War confrontation between the United States and the Soviet Union and brought the world to the brink of nuclear war.
Explanation: If you can pls give branlyest thx.
The development of a better way to produce iron cheaply.
Answer:the last one or the second one
Explanation:
A single issue
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Some evidence exists that ancient Greek and Roman artists used chiaroscuro effects, but in European painting the technique's originator was Leonardo da vinci in the late 15th century in such paintings as his Adoration of the Magi (1481).