Mesas

Inside the plane, half a dozen scientists are fine-tuning 10 kinds of weather sensors, including microwave and laser. They stay on board, monitoring their instruments, as pilots fly over pre-selected snowy mountains, and high, snowy mesas. They’re seeking accurate snow measurements, even when craggy peaks mean snow is at different levels in the peaks and the valleys. Even when trees and forests hide the snow.

Those multitoned buttes and mesas [of the Grand Canyon], and that incandescent sequence of colorful bands that make one of the natural wonders of the world so grand, can also be found over 100 million miles away [on Mars].