People like to make lists of things, especially lists of superlatives: the best, fastest, oldest, largest, heaviest and so on. There are lists of the ten fastest animals and the ten longest rivers and even of the ten highest-paid rock stars. The Guinness company created a small industry from publishing lists exactly…
This might seem like some kind of psychedelic artwork—but you're actually looking a hundreds of individual lava flows, frozen in time on the side of Olympus Mons on Mars.
The tallest peak in the solar system is Olympus Mons of Mars, three times taller than Mount Everest. But it's not as easy to say what the second tallest mountain is...but it might be found in the unlikeliest of places.
This is the Valles Marineris, believed to be the biggest canyon in the entire solar system. At nearly 2,500 miles long, it would stretch clear across the continental United States.
The great challenge for any climber is to conquer each continent's tallest mountain. But tomorrow's climbers can consider a far more extreme challenge: leaving Earth to climb the tallest peaks of the solar system. Here's how they'll do it.