# Topic: *geometry*

## 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...

## Calculating Pi (π) with Darts

Can you calculate Pi (π) by throwing darts at a square and circle target as randomly as possible? Physics Girl's Dianna Cowern and Veritasium's Derek Muller attempt the challenge, and when "randomly" doesn't happen, t...

## Ambiguous Cylinder Illusion by Kokichi Sugihara

Second place winner of the Best Illusion of the Year Contest 2016, this is the Ambiguous Cylinder Illusion by mathematics professor Kokichi Sugihara of Meiji University in Tokyo, Japan. The direct views of the obj...

## Tauba Auerbach’s massive pop-up book paper sculptures

Filmed for Nowness, this is Tauba Auerbach's massive book project with New York's Printed Matter bookstore: A series of six die-cut paper structures that pop-up into three dimensional sculptures. The tome is titled 2,...

## Notes on a Triangle (1966) by René Jodoin

From the National Film Board of Canada and director René Jodoin, this is Notes on a Triangle (1966), a ballet of three hundred geometric transformations, animated into divisions, alignments, and patterns. Waltz music ...

## General relativity & why GPS wouldn’t work if we didn’t know about it

General relativity, what Albert Einstein said was the happiest thought of his life, basically expands upon the idea that "the laws of physics are the same everywhere". Light and gravity behave in the same way for you....

## The Pythagorean theorem water demo

The Pythagorean theorem water demo: See the two smaller squares of water on the two shorter sides of a right triangle pour perfectly and equally into the area of the larger square on the longer side, known as the hypo...

## From Clay to Mosaics – How zellige (الزليج) mosaics are made

From Moroccan interior design company Habibi Interiors, watch as maâlems (master craftsmen) take their time and skill to create terra cotta tiles known as zellige, zillij, or الزليج, meaning "tiles" in Arabic: From Cl...

## Chris K. Palmer’s origami tessellations – Flower Tower

Origami artist Chris K. Palmer specializes in complex origami tessellations -- "a flat surface is the tiling of a plane using one or more geometric shapes, called tiles, with no overlaps and no gaps" -- that he folds ...

## Kokichi Sugihara’s Impossible Rooftop & Folding Ladder Illusions

File under impossible objects, this is the Impossible Rooftop Illusion or "Anti-Gravity Two Sided Roof" by Meiji University's Professor Kokichi Sugihara in 2013. Using computer software, Sugihara creates award-winning...

## Matchstick Triangle Puzzle – The Curiosity Show

Get out some matchsticks or toothpicks and some Play-Doh! Deane Hutton, science educator and co-host of Australia’s The Curiosity Show, sets up two challenges that requires some hands-on creative thinking: 1. How ...

## The Magic Moment: Work by paper engineer Peter Dahmen

From sketches, to prototypes, to finished three dimensional pieces, Germany-based paper engineer Peter Dahmen infuses his passion for movement into his paper structures and pop-up cards. In this film by Christopher He...

## The Iron Genie Harmonograph

Watch artist Anita Chowdry's Iron Genie Harmonograph create intricate, spirograph-like drawings. Made of steel, it was inspired by mid-19th century harmonographs and St. Pancras Station's Victorian engineering. The vi...

## Magnet-connected pyramids that transform into different shapes

Hypercubes are geometric art toys made by Andreas Markus Hoenigschmid. Their shapes can be reconfigured from a single cube or brought together with other cubes to build larger structures. From Hoenigschmid's site: ...

## Why do honeybees love hexagons?

What is it about the six-sided hexagon that makes it such a perfect shape for storing honey? It's an efficient design! Just ask a bee, one of nature’s finest mathematicians, or watch this TED Ed by Zack Patterson and ...

## How can a straight metal rod pass through a curved hole?

Imagine how you might pass a straight metal rod through a curved hole. How does that work if neither bends? Is it impossible? This demonstration at the Science Museum in Valencia, Spain shows that it's absolutely poss...