Big Beasts
After the dinosaurs died out, why didn't the remaining animals grow as big as dinosaurs again?
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After the dinosaurs died out, why didn't the remaining animals grow as big as dinosaurs again?
In the book The Hitchhiker's Guide to the Galaxy, the Vogons demolished Earth. They said it would take approximately 2 minutes, so how much energy would they have needed to obliterate our planet? Would kicking the planet out of its orbit have been more energy efficient than simple destruction?