Mars is 250 million miles from Earth at the farthest point in the planets' orbits. Sheer distance makes unpredictable weather, unexpected illness and even homesickness potentially deadly problems. Residents of the future Mars base won't be able to count on a rescue mission.
For other Devil's Trumpet, see Datura (disambiguation). Datura is a genus of nine species of poisonous vespertine flowering plants belonging to the family Solanaceae. They are commonly known as daturas, but also known as devil's trumpets, not to be confused with angel's trumpets, its closely related genus Brugmansia.
The North American Datum (NAD) is the datum now used to define the geodetic network in North America.A datum is a formal description of the shape of the earth along with an anchor point for the coordinate system.he North American Datum of 1983 is based on a newer defined spheroid (GRS 80); it is an Earth-centered (or  geocentric ) datum having no initial point or initial direction.