
So tragically I've had to work a full day at the hospital. Which is unfortunate as I'm suffering from major exhaustion and a bad headache. It could be some kind of virus, but to be honest I'm more inclined to blame my daughter and my workmate. One of them woke me up at 6am with endless chatter about nothing, while the other lent me a book of optical illusions which promptly gave me eye strain.
So I'm gagging Amelie and going to bed early without a good book. But here's my favourite picture of the day...

The yellow square in the centre at the front is exactly the same colour as the brown square in the centre on the top. No, seriously.
But whilst looking up the explanation for that image, I came across something even more weird. Never mind optical illusions, here's an auditory illusion. It's...
The Endless Octave!
Every note sounds higher than the one before, yet it goes on forever. It's Escher's staircase for the blind.
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