Mission to reveal interior of Red Planet for first time

The InSight mission, launched today from California's Vandenburg Air Force Base, is now on a six month cruise to Mars. It is expected to arrive in November, but what will it find? Mars may appear to be getting crowded, thanks to its growing robotic population, so why send another lander? Illustrator and planetary scientist James Tuttle Keane takes us inside the Red Planet to explain why InSight is such a unique mission. Set to land in Elysium Planitia, InSight will take up residence just north of the boundary between Mars' older, cratered southern highlands and northern lowland plains.