Those who had said that the earth was round were the Greek philosopher Eratosthenes, Posidonius and the Arab Caliph El Ma'mun. Then in the 15th century the roundness of the Earth was already fully accepted by the geographers of the time.
Columbus designed his trip using the calculations of a Greek sage who lived 17 centuries before. His name was Eratosthenes and he deduced at that time that the Earth was a sphere, and even measured its diameter by making calculations from the projection of shadows in different latitudes of the world. Columbus proposed to get from Europe to the east coast of Asia by a shorter route, traveling in the west, a revolutionary idea for a time when security was sailing with the African coast in sight. Columbus left with his 3 caravels and on the way discovered that the doctors had more reason than their optimistic calculations. Therefore, his crew was about to mutiny because the trip was longer than promised. Columbus never reached Asia, but halfway there he found a new continent and this coincidence saved his life and earned him a place in history.
The Sepoy rebellion refers to the Indian rebellion of 1857, wicth refers to a rebellion in India against the rule of the British east India company that may have ran from may 1857 to June 1858.the rebellion began as a mutiny of Sepoy of the east Indian Companys army on may 10 1857,in the cantonment of the town of Meerut and soon escalated into other mutinies and civilian Pradesh, Bihar, Northren Madhya Prades, Andthe Delhi region.
The USA was concerned because they feared that they would launch them, this happened in a point in time where relationships between the two countries were not good and they didn't trust each other. Then when Russia had missiles in Cuba, which is close to the US, it caused the US to freak out about it, it's now called the Cuban missile crisis.
