# Topic:math

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## An unexpected way to inflate a balloon – Numberphile

The kamifusen is a traditional Japanese paper (kami) balloon (fusen) toy that became popular in the 1890s and can still be found in a variety of designs or decorated as spherical koi, pufferfish, penguins, monkeys, ra...

## The mighty mathematics of the lever

Archimedes once said “Give me a place to stand, and I shall move the Earth.” While the idea of a person moving such a huge mass on their own might sound impossible, chances are you’ve seen this idea in action at your ...

## Dinara Kasko’s incredible edible geometric cakes

Ukrainian pastry artist Dinara Kasko creates incredible-looking edible cakes that are inspired by geometry, architecture, sculpture, and technology. For a 2017 ‘ruby chocolate’ event in Shanghai, she made an 81 piece ...

## How to equally share a cake between three people

When sharing cake between two people, the envy-free recommendation is for one person to cut the cake, making the two pieces as equal as possible, while the other person picks their preferred piece. With this agreement...

## Ballet Rotoscope

A ballerina dances as the joints on her body are traced with a computer-generated rotoscope animation technique, an algorithm that brings a mathematical layer to her natural movements. Ballet Rotoscope (2011) was crea...

## How many ways are there to prove the Pythagorean theorem?

What do Euclid, 12-year-old Einstein, and American President James Garfield have in common? They all came up with elegant proofs for the famous Pythagorean theorem, one of the most fundamental rules of geometry and th...

## The Kresling-Pattern and our origami world

Biruta Kresling is a Paris-based architect and independant researcher on folded structures—specifically how nature folds and unfolds tree leaves, tortoise shell bamboo, turbinate mollusk shells, the air sac of the h...

## Three Gears are Possible

If you've ever seen an image of three gears all interlocking or an odd number of interconnecting gears, like those gears on some British two pound (£2) coins, you've seen a gear configuration that does not work. Howev...

## Can you solve the fish riddle?

As the cargo director on the maiden voyage of the S.S. Buoyant, you’ve agreed to transport several tanks containing the last specimens of an endangered fish species to their new aquarium. Unfortunately, the boat is ba...

## A 3D printed mechanical laser show machine

Engineer, maker, and 3D printing enthusiast Evan Stanford has created a 3D printed, hand-cranked mechanical laser show machine that 'draws' with projected light. The drawn shapes are created with two rotating cams tha...

The Turing Tumble, this small Pachinko-like puzzle game prototype, is also DIY mechanical computer. Programmer Paul Boswell designed the Turing complete toy to help kids (and adults) learn, see, and feel how computers...

## The Universal Tea Machine, a huge mechanical ‘adding computer’

"The better your binary addition skills the better your cup of tea!" The Universal Tea Machine by Smout Allen is a huge mechanical 'adding computer' that mixes tea and mixes tea, a British tradition that became popula...

## Creating The Never-Ending Bloom: John Edmark’s spiral geometries

Artist, designer, inventor, and Stanford professor John Edmark creates sculptures that are driven by precise mathematics, but his interest in spiral geometries is driven by something more enigmatic... "a search for un...

## A woodworker creates ‘Fibonacci Spiral shavings’

With a freshly sharpened chisel, woodworker Paul Sellers creates what he calls 'Fibonacci spiral shavings,' shaved pieces of wood that resemble Fibonacci spirals, "an approximation of the golden spiral created by draw...

## Can you solve the virus riddle?

Your research team has found a prehistoric virus preserved in the permafrost and isolated it for study. After a late night working, you’re just closing up the lab when a sudden earthquake hits and breaks all the sampl...

## The Brick Double-Domino Effect Explained

In 2016, bricklayers in Teralba, NSW Australia filmed their domino-style technique for capping a concrete brick wall. The video went viral thanks to the surprising second part of the chain reaction: After the bricks f...

## A million things that make your head spin, a rainbow tape time lapse

A "six-story hurricane of color" ascends up into the atrium of Sydney, Australia's Customs House. The piece, titled A million things that make your head spin, was designed and installed with flagging tape—a weather-re...

## A Fold Apart: Origamist Robert Lang’s Incredible Paper Creations

Twenty five years ago, physicist Robert Lang worked at NASA, where he researched lasers. He has also garnered 46 patents on optoelectronics and even wrote a Ph.D. thesis called "Semiconductor Lasers: New Geometries an...

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