Cheng showed us that we can cut a bagel so it looks like a Möbius strip, which is a mathematical structure that only has one side. Here's how you can do it too. Follow Tech Insider: On Facebook ...

This is formed by placing two strips of paper together, giving them a single half-twist as if they were one strip, and joining ... This means that a torus can be cut along such a curved line ...

Its new Gboard Double-Sided Version, concocted as part of its annual whacky keyboard tradition, features a bespoke Mobius strip design instead of your run-of-the-mill rectangle. It's not for sale ...