Wand Through the Wall — a Straight Wand Passes Through a Curved Slit

**A straight wand passes through a curved slit.** Twice per turn. Without bending. The wand stands on a small turntable, leaning a little to the side. In front of it is a wall with two curved slits. Swing the wand round and it slides through the slit on the left, comes round the back, slides through the slit on the right, and returns. Then hand the wand over: it is dead straight. Roll it on the table to prove it. Now ask how a straight thing fits a curved hole. **The secret (it is geometry, not…

♥ 0 · ↓ 2