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NOVA

Ancient Earth: Birth of the Sky

Season 50 Episode 11 | 53m 47s

Early Earth was a hellscape of molten lava and barren rock, bombarded by meteors, with no atmosphere at all. How did our familiar blue sky – the thin, life-giving band of gasses protecting our planet – come to be?

Aired: 10/03/23 | Expires: 12/01/23
National Corporate funding for NOVA is provided by Viking Cruises. Major funding for NOVA is provided by the NOVA Science Trust, the Corporation for Public Broadcasting, and PBS viewers.
Extras
Watch • 4:29
Antiques Roadshow
Appraisal: 1990 Susan Butcher Iditarod Trophy
Appraisal: 1990 Susan Butcher Iditarod Trophy
Clip: S28 E1 | 4:29
Watch • 3:23
Antiques Roadshow
Appraisal: 1927 'The Jazz Singer' Vitaphone Sample Disc
Appraisal: 1927 'The Jazz Singer' Vitaphone Sample Disc
Clip: S28 E1 | 3:23
Watch • 2:51
Antiques Roadshow
Appraisal: 1969 Rolex Oyster Cosmograph
Appraisal: 1969 Rolex Oyster Cosmograph
Clip: S28 E1 | 2:51
Watch • 4:28
Antiques Roadshow
Appraisal: 1930 Edward Curtis 'The North American Indian'
Appraisal: 1930 Edward Curtis 'The North American Indian' Vol. 20
Clip: S28 E1 | 4:28
Watch • 3:34
Antiques Roadshow
Appraisal: Hans Wegner GE240 'Cigar' Chair, ca. 1955
Appraisal: Hans Wegner GE240 'Cigar' Chair, ca. 1955
Clip: S28 E1 | 3:34
Watch • 3:06
Antiques Roadshow
Appraisal: English Bass Violin, ca. 1790
Appraisal: English Bass Violin, ca. 1790
Clip: S28 E1 | 3:06
Watch • 3:49
Antiques Roadshow
Appraisal: 1907 Currier Co. Buffalo Bill Lithograph
Appraisal: 1907 Currier Co. Buffalo Bill Lithograph
Clip: S28 E1 | 3:49
Watch • 3:48
Antiques Roadshow
Appraisal: 1929 & 1941 Matanuska Colony Manuscript Maps
Appraisal: 1929 & 1941 Matanuska Colony Manuscript Maps
Clip: S28 E1 | 3:48
Watch • 1:03
Antiques Roadshow
Appraisal: Bippart, Griscom & Osborn Pendant Brooch
Appraisal: Bippart, Griscom & Osborn Pendant Brooch, ca. 1890
Clip: S28 E1 | 1:03
Watch • 2:54
Antiques Roadshow
Appraisal: Chilkat Blanket, ca. 1910
Appraisal: Chilkat Blanket, ca. 1910
Clip: S28 E1 | 2:54
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