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

Sun, 6/21 at 3:00 am on Austin PBS HDTV

Secrets of the Forest

Researchers around the globe gather data on how forests work and try to figure out how these ecosystems can help tackle threats of climate change and species extinction. (60 minutes)

Sun, 6/21 at 5:00 pm on Austin PBS HDTV

Secrets of the Forest

Researchers around the globe gather data on how forests work and try to figure out how these ecosystems can help tackle threats of climate change and species extinction. (60 minutes)

Tue, 6/23 at 6:00 pm on Austin PBS WORLD

Secrets of the Forest

Researchers around the globe gather data on how forests work and try to figure out how these ecosystems can help tackle threats of climate change and species extinction. (60 minutes)

Tue, 6/23 at 11:00 pm on Austin PBS WORLD

Secrets of the Forest

Researchers around the globe gather data on how forests work and try to figure out how these ecosystems can help tackle threats of climate change and species extinction. (60 minutes)

Wed, 6/24 at 7:00 am on Austin PBS WORLD

Secrets of the Forest

Researchers around the globe gather data on how forests work and try to figure out how these ecosystems can help tackle threats of climate change and species extinction. (60 minutes)

Wed, 6/24 at 8:00 pm on Austin PBS HDTV

Ancient Desert Death Trap

A team of archaeologists researches the "desert kites," the stone megastructures across northern Saudi Arabia and southern Jordan. (60 minutes)

Thu, 6/25 at 1:00 am on Austin PBS HDTV

Ancient Desert Death Trap

A team of archaeologists researches the "desert kites," the stone megastructures across northern Saudi Arabia and southern Jordan. (60 minutes)