I was just thinking about what it would be like to swap hellishly messed up Rubik's cubes of the same value with each other.
How quickly will they open again if it's not one of your own? Challenge acceptably?
30th November is the 334th day of the Gregorian calendar (the 335th in leap years) and
1609: Galileo Galilei observes the moon with his telescope for the first time and makes drawings of mountains, craters and oceans