A scrollytelling about...Reaction Diffusion

What do these animals have in common ?

Yes they live in savanah, they are mammals...

But that's not the point here

What they have in common is their fur

More precisely, the principle that governs it's patterns

The principle is called Reaction Diffusion

Reaction-diffusion is a mathematical model describing how two components change over time and space due to local reactions and diffusion…

or in simpler terms...

It’s like a recipe using math that predicts the formation of patterns in animal coats

But how does it work ?

The model explains how those patterns are created with 2 chemicals, an activator and an inhibitor.

Let’s say activators are like fires that are spread in a forest (the fur of the animal), and inhibitors are firefighters who have to extinguish those fires.

Each tree burned by fire is like a spot on an animal’s coat. If the fire spreads faster than firefighters can stop it, the animal will have more spots.

The other way around, if firefighters can extinguish fire faster than they spread, the animal will have smaller spots.

Let's try it out !

The magic thing with the model, is that we can change the speed of the fires and firefighters to generate differents patterns. (Choose an animal)

What's the history behind the model ?

The model was first published on 14th August 1952 in an article named

"The Chemical Basis of Morphogenesis"

Photo of the Article

It was only 25 years later when two scientist rediscovered this paper and became general scientific knowledge...

It’s Alan Turing who invented this model.

He was well known for being a key figure in cracking Enigma Machine during WW2.

Photo of Alan Turing in 1936 at Princeton University

Thanks to him, His discovery keeps inspiring us

In science

to explain placement of hair follicles on skin

Illustration of the placement of feather on a quail

In fashion

Photo of a designed lamp showcasing reaction diffusion Photo of a designed ring showcasing reaction diffusion

And many more to come...

A scrollytelling made by

logo of Funky Shrimp

Funky Shrimp