Some visual illusions

The rubik cube is SO amazing



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.

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.