The beauty of pi

Is an extraordinary number, the relationship between the circle and the diameter. Many discover have been allowed by it, also sending man to space.
0:10 Pi number and its value
0:42 Calculate pi
1:37 Infinite pi
1:52 Pi number record
2:20 NASA and pi number
2:36 Guinness World Record memory pi
2:53 Pi Greco Day
3:15 La Pi-philology