Mathematically Correct Breakfast
If you’ve got a bagel and a knife, you too can have a mathematically correct breakfast. The motion of the knife’s cuts follows a two-twist Möbius strip.
If that’s too easy, you can upgrade your cuts to one of George’s trefoil bagels, which have close infinite surface area for delicious shmear, according to math of course.
(by George Hart)
This is pretty mindblowing.