Nova, Ancient Earth: Frozen

PBS Western Reserve (WNEO 45.1 / WEAO 49.1):

Wednesday, Oct. 11, at 9 PM
Thursday, Oct. 12, at 2 AM

700 million years ago, Earth was a giant snowball cloaked in ice from pole to pole — a global 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.