“How well I have learned that there is no fence to sit on between heaven and hell. There is a deep, wide gulf, a chasm, and in that chasm is no place for any man.” -Johnny Cash
The largest mountains, the greatest chasms, steepest cliffs and the tallest peaks on Earth are certainly impressive, particularly when compared to the scale of a human. But compared to the mountains on Mars, Io, Vesta or Iapetus, or the canyons and cliffs on Mars, Mercury, or even Charon, Earth’s features look puny.
How could these small worlds, some of which — like Vesta — are barely 5% the diameter of Earth, have features that dwarf our own planet’s? The answer is in gravity itself: without the incredible gravitational pull that Earth experiences at its surface, these irregularities are unchecked by the same forces that pull Earth into such a nearly perfect sphere.