Imagine crossing an ocean and a continent, then climbing more than 19,000 feet above sea level and finding something from ...

Dichotomy of Hemispheres, The Red Planet has disparity between its northern and southern hemispheres. NASA’s Mars ...

It's the tallest mountain in Africa. King watched the sunrise from the summit, which is above the clouds. "You start looking around and taking it all in, almost feel like you're on Mars," he said.