NOVA - Season 50 - Eps 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.
About NOVA

Title: NOVA
First Air Date: 1974-03-03
Last Air Date: 2025-02-26
Status: Returning Series
Rating: 6.91/10 (from 122 votes)
Language: EN
Seasons: 53
Total Episodes: 1003
Network: PBS
Genres: Documentary
Production Companies: GBH
Synopsis
PBS' premier science series helps viewers of all ages explore the science behind the headlines. Along the way, NOVA demystifies science and technology, and highlights the people involved in scientific pursuits.