"Wait, what?" Dad asked.
"Think about it, Dad. Even Earth almost had life completely wiped out. The dinosaurs! A meteor hit and killed almost everything. It was such a chance occurrence, a tiny asteroid, hitting the planet dead on, out of all the other paths it could have taken. What if it missed? Would 65 million years of evolution with dinosaurs ruling the planet have looked different? Would some dinosaur species have developed a civilization in the 65 million extra years? What plants got wiped out? Was there something better than chocolate back then?" We just need to look at the planetary histories of the known worlds and figure out which ones had similar events that rewrote the planet's entire history. They might have entirely different civilizations, with entirely different technologies, and maybe a whole new biosphere of plants and flavors."
