Solar System's Volcanic Giants Dwarf Earth's Mightiest Mountains

Across the solar system, volcanoes of staggering scale remind us that Earth's most fearsome geological features are, in cosmic terms, modest hills. From the icy geysers of Saturn's Enceladus to the lava seas of Jupiter's Io, and culminating in Mars's Olympus Mons — a mountain three times taller than Everest and as wide as France — the universe has been building on a grander blueprint than our own planet allows. The reason lies in geology: where Earth's shifting tectonic plates carry volcanoes away from their heat sources, Mars holds still, letting magma accumulate across deep time into somethi