Math geeks need to know what time it is too. It all adds up to Euclid’s Proposition 1 Watch, the timepiece that demonstrates the mathematical postulate twice a day. In case you’re rusty on your ancient Greek mathematicians, Euclid’s Proposition states that any straight line can be used to make an equilateral triangle. Twice a day the “straight line” equilateral triangle (which is the second hand) falls perfectly in between the two circles (minute and hour hands) to prove the postulate. Yeah I don’t know how that works exactly either, but you math geeks and your math geeky friends out there probably do.