It seems like no time has passed since we found out that John Legend and Chrissy Teigen welcomed a baby girl, but we've already gotten tons of good looks at the new bundle of joy. In April, Chrissy took to Instagram to share the first snap of her
Koh-i-Noor Diamond, a British Crown Jewel. The Koh-i-Noor is a 106 carat diamond which was once the largest diamond in the world. Previously, it has belonged to various rulers in India; today it lies in the hands of the British royal family and is part of the Crown Jewels.
Walter S. McAfee is the African American mathematician and physicist who first calculated the speed of the moon. McAfee participated in Project Diana in the 1940s - a U.S. Army program, created to determine whether a high frequency radio signal could penetrate the earth’s outer atmosphere. To test this, scientists wanted to bounce a radar signal off the moon and back to earth. But the moon was a swiftly moving target, impossible to hit without knowing its exact speed.