This was certainly not the interest of most people in his day. At that time, people believed more in religion than in facts and people like Galileo Galilei (1564-1642), who proved scientific ideas such as "the Earth is not the centre of the universe", were often punished by the church with no one coming to their defence. The church and many people tended to ignore the facts and were unwilling to challenge what they had always comfortably believed. They preferred to make assumptions about the world based on the experience of others. In fact, when Galilei proved that the Earth was not the centre of the universe, instead of believing him, people chose to believe views that were almost 2000 years old! It is not surprising that people wanted to believe these ancient views as they had been put forward by the great philosopher Aristotle (384-322 BC).