Season 3, Episode 10

Examining the possibility of a planet similar to Earth.

The possibility of an asteroid striking Earth and causing catastrophic destruction is examined. Included: ways to prevent such a disaster.

An exploration of the questions posed by the possibility of living in space, including how food would be grown and harvested; what clothes would look like; where homes would be located; and what mode

Asteroids and comets and their effects, both good and bad, are examined. Included: their function in the formation of our solar system; their possible role in the extinction of dinosaurs; and theorie

Season 3, Episode 5

Studying sex and procreation in space, including the physiological, psychological and cultural challenges.

Light speed is examined. Included: the quest to break the light-speed barrier; and how light speed enables scientists to look back in time, revealing the way the universe appeared billions of years a

Parallel-universe theories are explored. Included: experiments using particle colliders to determine the existence of new dimensions and universes.

In the Season 2 opener, the dangers of space travel, particularly after the launch and the reentry into Earth\’s atmosphere, are examined.