NOVA

Ancient Earth: Birth of the Sky

Animation and science experts reveal how the blue sky came to be. (60 minutes)

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UPCOMING EPISODES

Tue, 1/20 at 6:00 pm on Austin PBS WORLD

Astrophysicists and engineers look at evidence that supports the existence of UFOs. (60 minutes)

Tue, 1/20 at 11:00 pm on Austin PBS WORLD

Astrophysicists and engineers look at evidence that supports the existence of UFOs. (60 minutes)

Wed, 1/21 at 7:00 am on Austin PBS WORLD

Astrophysicists and engineers look at evidence that supports the existence of UFOs. (60 minutes)

Wed, 1/21 at 8:00 pm on Austin PBS HDTV

A look at whether giant asteroid impacts were actually essential for the creation of life on Earth. (60 minutes)

Thu, 1/22 at 1:00 am on Austin PBS HDTV

A look at whether giant asteroid impacts were actually essential for the creation of life on Earth. (60 minutes)

Thu, 1/22 at 2:00 am on Austin PBS HDTV

Exploring wandering worlds that move around the solar system, from meteorites that impact Earth to a moon that orbits backwards. (59 minutes)

Sun, 1/25 at 3:00 am on Austin PBS HDTV

A look at whether giant asteroid impacts were actually essential for the creation of life on Earth. (60 minutes)