# acad: cinnamon buns, pretzels and bagels to explain unusual phases or states of matter, by Thors

<< What do a pretzel, a lock of hair and a scream have in common? >>

<< Thors Hans Hansson, a member of the Nobel physics committee, uses a cinnamon bun, a pretzel and a bagel to explain the field of topology, a highly specialised mathematics field studying unusual phases or states of matter >>

<< Referring to the two holes in the pretzel, the one hole in the bagel, and the shape of a bun, Hansson demonstrated that topology explains how a material's shape can be completely deformed into a new one without losing its core properties >>

Ilgin Karlidag. Bagels, pretzels, Boo! How to explain science Nobels. Oct 1, 2017

https://m.phys.org/news/2017-10-bagels-pretzels-boo-science-nobels.html