Archive for the ‘Fun’ Category:

Rubik’s Cube World Records for 3×3 Puzzles (Regular, feet, blindfolded, one-handed)

Posted In: Fun
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I recently taught my daughter how to solve the rubik’s cube using “the beginner method”. She’s getting decently fast, but when we watched some youtube videos about really fast speed cubers, we were blown away by how fast people can solve the cube. The world record time is under 4 seconds! I thought it’d be fun to document the progression of world records since the cube was introduced in 1980.

What was interesting in looking through the records are the strange events that people compete in and post amazing times in. Blindfolded! With Feet! One-handed! Feet or one-handed is at least in the realm of possibility, though it would slow down my already slow solves, but blindfolded is next-level stuff.

Hover over the different data series for the events to see the record-holder’s name, country, solve time and competition for each world record. You can also toggle the y-axis scale from linear to log scale in order to distinguish between the latest world records as they tend to converge and have very small changes.

Not sure if it’s motivating or discouraging to see these ridiculously fast solve times. Knowing that we’ll never be able to beat people who solve the cube blindfolded is a bit humbling.

Data and Tools:
Data was downloaded from cubecomps.com, a speed cubing website and the data was plotted using the open-sourced Plot.ly javascript engine.

rubik's cube world record times

Antipodes map: What’s on the other side of the Earth?

Posted In: Fun | Maps
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What is an antipode?

An antipode is a point that is on the exact opposite side of the earth (or other sphere) from a given location. If you drew a line (vector) from your location to the center of the earth and continued that line until it emerged from the other side of the earth’s surface, that point of intersection on the other side is the antipode. When I was a kid, people occasionally mentioned “digging a hole to China”. While this is currently impossible for many reasons1Earth’s core is about 6000 degrees C, China is not the antipode for North America (where I grew up). If you grew up in Argentina or Chile, then maybe that would make a little more sense.

The antipodes for most of North America and Europe are in the Indian and South Pacific oceans respectively.

Other examples of antipodes that are both on land:

Instructions:

It should be relatively explanatory, but you find your location by dragging the globe on the left side so that your location is in the center crosshair. The other globe (on the right) will show you the antipode to your location.
You can zoom in and out with the +/- buttons or pinch to zoom on mobile. If you zoom in enough, it will look like a normal two-dimensional web map (like google maps).

Tools:
This interactive visualization is made using the awesome webglearth javascript library. I just discovered this recently after making a number of 2D maps.


Footnotes   [ + ]

1. Earth’s core is about 6000 degrees C

¿Cuánto tardarías en contar hasta un millón?

Posted In: Counting | Fun | Math
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Disculpe(n) mi pobre español. Utilicé google translate para escribir esto en español.
Aquí está la calculadora que calculará cuánto tiempo lleva contar un millón (o números mayores) en español.
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Interactive Dot Illusion (Individual Linear Motion Yields Circular Motion)

Posted In: Fun
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This post doesn’t really involve data, but I was just messing around with animation and the canvas in Javascript and decided to make this. It’s a fun little interactive web animation that makes aggregate circular motion from a bunch of dots moving in straight lines. There are no real instructions except to mess with the controls and see what it does to the animation (i.e. change the number of dots, the speed slider, the dot colors, and show the dot paths).
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