A science curiosity whose ancient and mysterious properties capture the attention of all ages.
This little oddity has a natural spin bias, in that if you spin it one way it stops and then spins the other way! Why? Check out it's center of balance. Being clear and curved it also acts as a lens that magnifies vertically.
This little oddity has a natural spin bias, in that if you spin it one way it stops and then spins the other way! Why? Check out it's center of balance. Being clear and curved it also acts as a lens that magnifies vertically.