NOVA

The Planets: Inner Worlds

episode / view more episodes

The Planets: Inner Worlds

The rocky planets - Mercury, Venus, Earth and Mars - were born of similar material around the same time, yet only one supports life. Were Earth's neighbors always so extreme? Is there somewhere else in the solar system where life might flourish?

Related Gifts

The Secret Life of Fat (Paperback Book)

Donate $72.00 or more to receive this gift as our way of saying "thank you!"

NOVA: The Truth About Fat DVD

Donate $96.00 or more to receive this gift as our way of saying "thank you!"

NOVA: The Truth About Fat: DVD + PBK + Digital Kitchen Scale

Donate $180.00 or more to receive this gift as our way of saying "thank you!"

Thanks to our sponsors: