4
Mac and Bob had vacated their normal stools and moved to the opposite side of the bar to watch the astronomy club members as their meeting commenced. It was giving the boys something to ponder.
“Do you really think space is infinite?” Mac asked. “How can something never end?”
“Nah, the way I understand it, it’s growing,” Bob said. “The universe keeps pushing the space walls out.”
“There’s no such thing as space walls,” Hank stated.
“Then where does the universe stop and nothing begins?” Mac asked. “And where does this nothing exist?”
“It doesn’t exist,” Bob said. “It’s nothing.”
“Is that the same as a black hole?” Mac asked.
Bob snickered, ready to launch into a joke. “No, that’s . . .”
“Stop!” I interrupted. “I don’t want to hear the joke again.”
“Loosen up,” Bob said. “It’s a
