I went to the woods because I wished to live deliberately, to front only the essential facts of life, and see if I could not learn what it had to teach, and not, when I came to die, discover that I had not lived.
Henry David Thoreau (1817-1862),
Walden (1854)
domingo, 10 de abril de 2011
Escalas de realidad: mundo macroscópico, molecular, atómico, subatómico, y cuerdas.
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