Shigeru Kondo spent some $18,000 to build a desktop Windows computer that, over the course of three months, shattered the world record for calculating pi. Running in the 54-year-old system engineer's home, where he lives with his wife and mother, the machine calculated pi to 5 trillion decimal places, nearly double the previous record of 2.7 trillion set by French programmer Fabrice Bellard late last year.
In an effort to test the awesome power of their new super computer, a team of scientists at University of Tsukuba, Japan, have calculated Pi out to 2.5 trillion decimal places, more than doubling the previous record.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.