"What is BFR?" asked Pete Starling. For the graph's vertical scale was labeled thus. "Bolide Fragmentation Rate," Doob said. "The rate at which new rocks are being produced." "Is that a standard term?" Pete wanted to know. His tone was not so much hostile as unnerved. "No," Doob said, "I made it up. Yesterday. On the plane." He was tempted to add something like I am allowed to coin terms but didn't want things to get snarky this early in the meeting."