What is the planet Mars like?

Out beyond Earth, one planet over from us, hangs a small rusty world named Mars. It glows a faint reddish-orange in our night sky, which is why people once called it the red planet. And red it truly is — not painted red, but rusted red, like an old bike left out in the rain for a few billion years.
That red color is real, honest rust. Mars is covered in dust full of iron, the same metal in your kitchen pans, and iron turns reddish when it meets oxygen. So the whole surface is basically a planet-sized sprinkle of rusty powder. Wind blows it everywhere, tinting the ground, the rocks, and even the sky a dusty butterscotch color.
