A Heliocentric Theory. By 1532 Copernicus had mostly completed a detailed astronomical manuscript he had been working on for 16 years. He had resisted publishing it for fear of the ensuing controversy and out of hope for more data.
The heliocentric model was generally rejected by the ancient philosophers for three main reasons: If the Earth is rotating about its axis, and orbiting around the Sun, then the Earth must be in motion. However, we cannot ``feel'' this motion. Nor does this motion give rise to any obvious observational consequences.
The Cuban Missile Crisis was started by the photographs taken by the U-2 spy plane but the real issue was that Cuba was building missile launching pads and the Soviet Union was supplying them with those missiles.
The US ended up blockading Cuba to keep the Soviet ships from arriving in Cuba.
The expedition was launched in retaliation for Villa's attack on the town of Columbus, New Mexico, and was the most remembered event of the Mexican Border War.
