If it were widely understood that claims to knowledge require adequate evidence before they can be accepted, there would be no room for pseudoscience. - Carl Sagan

The neutrons, as we have said and as their name suggests, carry no electrical charge. The protons have a positive charge and the electrons an equal negative charge. The attraction between the unlike charges of electrons and protons is what holds the atom together. Since each atom is electrically neutral, the number of protons in the nucleus must exactly equal the number of electrons in the electron cloud. The chemistry of an atom depends only on the number of electrons, which equals the number of protons, and which is called the atomic number. Chemistry is simply numbers, an idea Pythagoras would have liked. If you are an atom with one proton, you are hydrogen; two, helium; three, lithium; four, beryllium; five, boron; six, carbon; seven, nitrogen; eight, oxygen; and so on, up to 92 protons, in which case your name is uranium.

When Geppetto is just finishing the construction of Pinocchio, he turns his back on the puppet and is promptly sent flying by a well-placed kick. At that instant the carpenter's friend arrives and asks him what he is doing sprawled on the floor. 'I am teaching', Geppetto replies with dignity, 'the alphabet to the ants.'
This seemed to Ellie extremely witty, and she delighted in recounteing it to her friends. But each time she quoted it there was an unspoked question lingering at the edge of her consciousness: Could you teach the alphabet to the ants? And would you want to? Down there with hundreds of scurrying insects who might crawl all over your skin, or even sting you? What could ants know, anyway?

Otkako su ljudska bića zaposjela Zemlju, noćno je nebo bilo sudrug i nadahnuće. Zvijezde su smirivale čovjeka.
Nekima je nebo otvaralo put prema vjeri. Drugima je svemir pružao poticaj za najneobičnija maštanja.