Why did Galileo almost become a monk? How did the Catholic Church have an impact on Galileo's scientific work? How did a feather, a hammer and an astronaut prove one of Galileo's theories? Galileo lived at a time when many of the facts about the universe that we take for granted were revolutionary, even dangerous. Scientists were expected to follow the theories of ancient philosophers and solve scientific problems using logic rather than experiments. Galileo dared to challenge the established ideas and, as a result, changed the way we view our place in the universe.