Welcome to the Mobius bagel slice! Get two layers of deliciousness not just one!
A Mobius strip is a surface with only one side. You can make one by taking a strip of paper, twisting one end halfway around, and taping it to the other end. Like this:
which leads to this:
Read all about it here.
And if you have a geo-spatial hankering for the Mathematically Correct Breakfast, have a look at this. It is much more fun to put cream cheese on these bagels than on an ordinary bagel. In additional to
the intellectual stimulation, you get more cream cheese, because there is slightly more surface area.
Want some more math? Using calculus, find the ratio of the surface area of this linked cut to the surface area of the usual planar bagel slice.