The Inner Planets: Mercury & Venus

S1, E7: Scorched by their proximity to the sun, Mercury and Venus are hostile worlds; one gouged with craters from cosmic collisions and the other a vortex of sulfur, carbon dioxide and acid rain. Prime examples of planets gone awry, do they serve as a warning for ominous scenarios that might someday threaten Earth? Cutting-edge computer graphics are used to show what life would be on other planets and to imagine what kind of life forms might evolve in alien atmospheres.