Mirror-Type Beamsplitters

Which fact about our moon do you find most suprising:

• The "dark side of the moon" receives about as much sunlight as the side that faces us.
• Literally tons of frozen ice water exists beneath the moon's surface.
• The coldest temperature in the universe was actually meassured on our moon (-415 degrees F)
• Unlike those on Earth, all lunar mountains were basically all created in just a matter off seconds due to impact displacement from asteroids.