NOVA

Season 50 Episode 12: Ancient Earth: Frozen

700 million years ago, Earth was a giant snowball cloaked in ice from pole to pole—a global deep freeze that held the planet in a stranglehold, threatening the survival of the earliest complex life. How did life manage to hold on in this forbidding world? Leading scientists investigate how this catastrophe may have become a catalyst for life to evolve in creative new ways as it bounced back from the brink—setting the stage for the astonishing complexity we see today.

Genre:

Documentary

Seasons:

53

Episodes:

1025

Cast:

Quality:

HD

Duration:

54 min

First Air:

1974

Rating:

7.0