NOVA.

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

Wed, 5/20 at 8:00 pm on Austin PBS HDTV

When Whales Could Walk

Paleontologists uncover a whole new species of whale in a parched valley not far from Cairo. (60 minutes)

Thu, 5/21 at 1:00 am on Austin PBS HDTV

When Whales Could Walk

Paleontologists uncover a whole new species of whale in a parched valley not far from Cairo. (60 minutes)

Sun, 5/24 at 3:00 am on Austin PBS HDTV

When Whales Could Walk

Paleontologists uncover a whole new species of whale in a parched valley not far from Cairo. (60 minutes)

Sun, 5/24 at 5:00 pm on Austin PBS HDTV

When Whales Could Walk

Paleontologists uncover a whole new species of whale in a parched valley not far from Cairo. (60 minutes)

Tue, 5/26 at 1:00 pm on Austin PBS WORLD

Angkor: Hidden Jungle Empire

New evidence sheds lights on the life and mysterious collapse of Cambodia's ancient jungle city. (60 minutes)

Tue, 5/26 at 6:00 pm on Austin PBS WORLD

When Whales Could Walk

Paleontologists uncover a whole new species of whale in a parched valley not far from Cairo. (60 minutes)

Tue, 5/26 at 11:00 pm on Austin PBS WORLD

When Whales Could Walk

Paleontologists uncover a whole new species of whale in a parched valley not far from Cairo. (60 minutes)

Wed, 5/27 at 7:00 am on Austin PBS WORLD

When Whales Could Walk

Paleontologists uncover a whole new species of whale in a parched valley not far from Cairo. (60 minutes)