MacTutor
25th August
On this day in 1664 Robert Hooke wrote to Robert Boyle about new experiments he was performing in the damaged steeple of Old St Pauls. One involved a 180 foot long pendulum with a four pound weight that swung with a 12 second period.
On this day in 2009 Google released a Galileo telescope doodle.
On this day in 2009 Google released a Galileo telescope doodle.