Marcelo Galvani

Here

Test your intellectual capacity
Test of Einstein (download)
Cross the River

Here (in the menu select: "Imagining the 10th dimension".)
Or just read the text here

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Here's the version the cÃ'mica
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Dance, Monkeys, Dance
by Ernest Cline
Galaxies billions in There're of observable Universe
And each of them contains hundreds of billion of stars.
In one of these Galaxies,
Orbiting one of these stars,
Lies a little blue planet.
And this planet is run by a bunch [...]

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