"And a proton, which is positively charged?"
Again he nodded.
"Well, scientists have learned that there could be positive electrons, as well as negative, and negative protons. In other words each sub-atomic particle has a 'minus quantity' counterpart."
"You're saying it, I'm believing it," said Red. "A guy's gotta believe something."
"Well, this leads to a great deal of speculation. If these minus quantities got together they might form a minus matter."
"You've got me in a hole, so I'm minus too."
"You don't have to understand it, but try to imagine that two universes could exist side by side, one minus, one plus, and that neither could be aware of the other. Every star, every planet and every speck of matter could have its counterpart, but neither would be aware of that counterpart's existence."
Red grinned and shook his head. "Crazy," he said.
"Yes, crazy. But dig this, supposing that some sixth sense made it possible for one of our minus counterparts to get in contact with us through extra-sensory perception."
"How'd they do it?" Red asked.