"The ancient history of the two planets is similar in many ways, and it is very fascinating that in the course of evolution the two worlds have taken such different paths," explains astrobiology expert Amy Williams of the University of Florida. "If there really is no life on Mars, why isn't there? What has changed? What has happened? Why wouldn't there be? And, if there was in the past, what happened then?" Dictionary Click on a word to look it up.

Astronauts search for solutions to save a dying Earth by searching on Mars, only to have the mission go terribly awry.

An agent from a distant planet has been sent to earth to ship large quantities of blood to his world, where a plague is ravaging the populace. He comes equipped with an interstellar matter transmitter, telepathic mind-control powers, and deathray-shooting eyes. Because he is also affected by the blood disease, he gains control of the town's physician and has him place a nurse at his disposal, while he collects live humans for fresh blood; but gains the nurse's suspicions, along with those of her boyfriend - a town police officer.

An epic journey around Mars — built from real satellite and rover data — revealing the red planet as you’ve never seen it before.