Discovery Miracle Planet Disc 2: Snowball Earth (2005)

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Peter's DVD rating: 4 stars
3:30 Archean granite boulder (diamagtite erratic) in 2.4 billion year old rock (near Lake Huron, Canada) 4:30Snowball Earth twice in history, shown by magnetic lava (Namibia) 14:30Don Berryhill collects methane gas from Archaea , which may have kept Earth warm. (Loblolly Bay, Okefenokee Swamp)
18:00Photosynthetic cyanobacteria produce oxygen, eliminatin methane, leading to global glaciation 21:30Viggo Marteinsson investigates thermophiles in hot springs (Iceland) 22:30 Cyanobacteria
24:00 Choanoflagellate 25:00 Pteridinium fossil 600 million years old (Namibia) 27:00Edicaran fossils Giorgia (13) Kimberella (Siberia) 25
28:40 Vertebrate fossil 560 million years old (Australia 2003) 29:40 Oxygen oxidizes manganese (manganese deposit in kalahari, South Africa) 32:20 Oxygen levels rose after the 2 snowball events
33:30 Volcanic eruptions may have replenished carbon dioxide in the air 39:30 Cells can secrete collagen (which contains oxygen and is formed with 2 amino acids not in the genetic code) to cluster together, forming tissue-like skin 44:50 Arandaspis oldest fish with a backbone, no fins or jaws
45:50 Trilobite and chain coral fossils in quarry from Iapetus Sea vanished 400 million years ago (Shropshire, England)      
diamagnetite
3:30 Archean granite boulder (diamagtite erratic)
magnetic
4:30 magnetic lava
methane
14:30 methane gas
Archaea
14:30 from Archaea
Cyanobacteria
22:30 Cyanobacteria
Choanoflagellate
24:00 Choanoflagellate
Pteridinium
25:00 Pteridinium
Giorgia
27:00 Giorgia
Kimberella
27:00 (13) Kimberella
Vertebrate fossil
28:40 Vertebrate fossil
manganese oxide
29:40 Oxygen oxidizes manganese
oxygen levels
32:20 Oxygen levels
volcano
33:30 Volcanic eruptions
collagen
39:30 Cells can secrete collagen
collagen skin
39:30 tissue-like skin
Arandaspis
44:50 Arandaspis
Trilobite
45:50 Trilobite
chain coral
45:50 chain coral

Index Feb 21, 2010 CC BY 4.0 Peter Chen 2.0