"He never actually touched her. In everyday life on our world, on the scale of atoms,
material objects never really touch. Each atom has a tiny nucleus at its center, surrounded by an
electron cloud of lines of force. As the atoms approach each other, the boy's electron clouds
push away the girl's.
More than 99. 9% of the matter of any atom is concentrated in its nucleus. The nucleus is surrounded by an electron cloud which
produces an invisible field of force, and acts like a shock absorber. The configuration of the electron cloud determines the
nature of an element. In the ordinary course of things here on earth, the nuclei
never touch. We have a sensation of touching, but that's really just our
invisible force fields overlapping and repelling each other."
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