Mathematician Hannah Fry explains the "Ham Sandwich Theorem," a mathematical concept that says that even the most poorly constructed sandwich can be cut exactly in half with only one straight cut of a knife.
Proposed by Hugo Steinhaus and proved by Stefan Banach in the 1930s, it's also called the Stone–Tukey theorem after Arthur Harold Stone and John Tukey, who wrote an expanded paper on the theorem in 1942.
Unfortunately, the theorem does not provide insight into where to make this cut. Of course, as anyone who has to divide a sandwich in half knows, the best way to get two perfect halves is to ask one young sibling to cut it in half and let the other sibling pick which half they get. You'll rarely see such precise division outside a science lab. Works even better on three-layer cake.
• Ham Sandwich Problem (YouTube / Numberphile)
Kensuke Koike demonstrates a cool visual trick involving an evenly-punched hard copy of an image turned into a regognizable avatar.
Artist and designer Rus Khasanov (previously) has created a bright and highly-detailed montage of colors colliding. What really sets this apart is the beautiful music by Dmitry Evgrafov.
Slinky Josh bills himself as North America’s first professional slinky manipulator, and if the passers-by are any indication, he’s very good at his chosen profession.
Traveling isn’t always the most comfortable experience, but at least you have your music to keep you company on those long flights. That is, until your chatty neighbor and that crying baby three seats over drown out your playlist. These Paww WaveSound 3 Noise-Cancelling Bluetooth Headphones block up to 20 decibels of audio, so you can […]
SEO can be a fickle creature, but it can work in your favor—you just need the right tools. When it comes to getting your site on that coveted first page of Google, SERPstash Premium simplifies the process with 21 user-friendly tools designed to break down your page’s performance and show you where you can improve. Lifetime […]
Running a Shopify store is a great way to net some extra cash on the side or—if you really know what you’re doing—replace your 9-to-5 altogether. However, success doesn’t come naturally, and newcomers tend to receive mixed results when starting on their own. This E-Commerce Bootcamp can help start your Shopify venture off on the right […]