Pisa tower
(Friday, June 26th, 2009)
A very usual picture for tourists in Pisa (Italy), with a variety of options.
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Blue blocks
(Friday, June 12th, 2009)
Despite what you may think the blue blocks appearing at the top of the cube are the same colour on both images.
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Eclipse of Mars
(Friday, June 5th, 2009)
Start by looking at the white dot. For a long time. Then, move backwards slowly and you will notice that the red circle will disappear progressively.
Eclipse of Planet Mars
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