Some visual illusions

The rubik cube is SO amazing

 

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Decorator crab and other amazing creatures

I was watching Numb3rs 522 where Charles used the analogy of a decorator crab to explain the model of the copycats criminals and I became curious. So I looked it up on youtube and realised it is quite a cool organism, it basically decorate itself with items in its surrounding to blend in.

http://www.youtube.com/watch?v=rUfp5lhtML0

There are also many other organisms that camouflage themselves and it reminds me how intricate these organisms are.

After some more random youtube surfing, I came across this video of fire urchin, which just looks pretty cool.