NASA’s Pi Day Challenge: Can you answer four science and engineering questions? 

NASA's Pi Day Challenge: Can you answer four science and engineering questions? 

To celebrate Pi Day, NASA’s Jet Propulsion Laboratory is serving up a series of science and engineering questions related to some of the agency’s Earth and space missions. It’s deliciously reliable, like cherry pie: Divide the circumference of any circle in the universe by its diameter, and you will always get the same number, pi, […]