nasa believes, there is water ice on the south pole. a possible source of drinking water, and rocket fuel. but, as colder, with less sunlight, lisa of the pool lab. >> you will have this dusk lighting, and behind any large rock, or things like that, you will have a long shadow where we'll be pitch black. >> certainly, it's easier to drive when you are in the sunlight. >> absolutely. >> those shadows are so long. >> already, astronauts are using simulators to practice driving a rover on the moon. >> so, astronauts need to learn how to drive a rover, without going into one of these holes, and craters. >> exactly. you, very often, don't know how deep these creators are. it is difficult to tell how big these rocks are, with 18 inches of clearance on your reference vehicle here. there are rocks that you cannot drive over. >> nasa promised the first astronauts to land on the moon will include a woman, and a person of color. >> since i've been up here -- >> captain victor glover, going to the space station on spacex crew one. >> we have an astronaut corps that represents our country. when we were in space, we are representing all of hum