
400 years ago today, Galileo first demonstrated his telescope to a group of merchants, and changed the face of science, religion and society forever.
This year really is one for scientific anniversaries: 400 years since Kepler’s laws of planetary motion; 200 years since Darwin’s birth; 150 years since Origin Of Species; 100 years since the discovery of the magnetic South Pole; 50 years since the first photos of the dark side of the moon.