NOVA | Becoming Human Part 3 | Brink of Extinction 140,000 years ago, climate shifts nearly wipe... 140,000 years ago, climate shifts nearly wipe out Homo sapiens. (9:35)

• Duration: 9:35
  Copyright © 2009 WGBH Educational Foundation
  TV Rating: TV-PG
  

Nature | Frogs: The Thin Green Line It is the greatest mass extinction since the ... It is the greatest mass extinction since the dinosaurs. (50:31)

Chapter(s) 1 - 7 of 7

• 1. 1.Delicate and Diverse,
  2. 2.The Race to Understand Chytrid,
  3. 3.Chytrid is on the Move,
  4. 4.A Noah's Ark of Sorts,
  5. 5.Reports of Deformities,
  6. 6.A Way to Deal with Chytrid?,
  7. 7.Habitat Loss Plays a Role

• Duration: 50:31
  Copyright 2009 WNET.ORG
  TV Rating: TV-PG
  

NOVA | Last Extinction Scientists propose a radical idea of what kil... Scientists propose a radical idea of what killed off mammoths and other Ice Age animals. (52:10)

Chapter(s) 1 - 6 of 6

• 1. 1.The Big Die-Off,
  2. 2.Who or What Did It?,
  3. 3.A Furious Debate,
  4. 4.Jewels in the Earth,
  5. 5.Where's the Crater?,
  6. 6.An Open Question

• Duration: 52:10
  Copyright 2009 WGBH Educational Foundation
  TV Rating: TV-PG
  

Nature | American Eagle In the 1960s, the bald eagle became an emblem... In the 1960s, the bald eagle became an emblem of environmental degradation. (50:20)

Chapter(s) 1 - 5 of 5

• 1. 1.A Distinctly American Symbol,
  2. 2.Eagles Survive Siege & Rebound,
  3. 3.Winter: A Brutal Season,
  4. 4.Bald Eagle Reality TV,
  5. 5.Eaglets take their first flights

• Duration: 50:20
  Copyright 2008 Educational Broadcasting Corporation
  TV Rating: TV-PG
  

NOVA | Arctic Dinosaurs | Path to Extinction The discovery of arctic dinosaurs calls into ... The discovery of arctic dinosaurs calls into question a theory about dinosaur extinction. (9:24)

• Duration: 9:24
  Copyright WGBH Educational Foundation
  TV Rating: TV-PG
  

NOVA | Arctic Dinosaurs Experts in Alaska investigate how dinosaurs m... Experts in Alaska investigate how dinosaurs managed to thrive in polar regions. (52:23)

Chapter(s) 1 - 6 of 6

• 1. 1.Alaskan Thunder Lizards,
  2. 2.Blasting for Fossils,
  3. 3.Secrets in the Leaves,
  4. 4.Polar Summers,
  5. 5.Path to Extinction,
  6. 6.Warm-Blooded Beasts

• Duration: 52:23
  Copyright WGBH Educational Foundation
  TV Rating: TV-PG
  

NOVA | Bone Diggers | The Extinction Debate When and why did Thylacoleo and Australia's o... When and why did Thylacoleo and Australia's other "megafauna" die out? (7:16)

• Duration: 7:16
  Copyright © 2007 WGBH Educational Foundation and Storyteller Media Group Pty Ltd, Western Australian Museum
  TV Rating: TV-PG
  

NOVA | Bone Diggers Deep in an Australian cave, paleontologists d... Deep in an Australian cave, paleontologists discover fossils of extinct giant animals. (52:25)

Chapter(s) 1 - 6 of 6

• 1. 1.A Remarkable Discovery,
  2. 2.The Dig Begins,
  3. 3.Meet Thylacoleo,
  4. 4.Back at the Lab,
  5. 5.On the Hunt,
  6. 6.The Extinction Debate

• Duration: 52:25
  Copyright © 2007 WGBH Educational Foundation and Storyteller Media Group Pty Ltd, Western Australian Museum
  TV Rating: TV-PG
  

NOVA scienceNOW | Mass Extinction, 1918 Flu, Cynthia Breazeal, Papyrus | Cosmic Perspective Neil deGrasse Tyson's thoughts on extinction Neil deGrasse Tyson's thoughts on extinction (2:12)

• Duration: 2:12
  Copyright 2008 WGBH Educational Foundation
  TV Rating: TV-G
  

NOVA scienceNOW | Mass Extinction, 1918 Flu, Cynthia Breazeal, Papyrus | Mass Extinction What caused the mother of all extinctions 250... What caused the mother of all extinctions 250 million years ago? (15:21)

• Duration: 15:21
  Copyright 2008 WGBH Educational Foundation
  TV Rating: TV-G