Columbus brought back Natives after his first voyage to show what he had found, there is no approximate number of how many people he killed, maybe not by himself... but because of him they died. I would say over 10 thousand, at least. Christopher Columbus was a terrible man. He only came to our country for gold, he killed so many native Americans who were innocent and he also brought many new diseases to the "new world".
Answer: Hello, Galileo agreed not to teach the heresy anymore and spent the rest of his life under house arrest. It took more than 300 years for the Church to admit that Galileo was right and to clear his name of heresy.