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  • 3D Scan of Tiktaalik Fossil – Humerus

    3D Scan of Tiktaalik Fossil – Humerus

    3D Model

    3D-scans of fossil bones of Tiktaalik, a creature with a mix of features common to fish and tetrapods.

  • 3D Scan of Tiktaalik Fossil – Pelvis

    3D Scan of Tiktaalik Fossil – Pelvis

    3D Model

    3D-scans of fossil bones of Tiktaalik, a creature with a mix of features common to fish and tetrapods.

  • 3D Scan of Tiktaalik Fossil – Pectoral Fin

    3D Scan of Tiktaalik Fossil – Pectoral Fin

    3D Model

    3D-scans of fossil bones of Tiktaalik, a creature with a mix of features common to fish and tetrapods.

  • 3D Scan of Tiktaalik Fossil –  Body

    3D Scan of Tiktaalik Fossil – Body

    3D Model

    3D-scans of fossil bones of Tiktaalik, a creature with a mix of features common to fish and tetrapods.

  • 3D Scan of Tiktaalik Fossil –  Skull

    3D Scan of Tiktaalik Fossil – Skull

    3D Model

    3D-scans of fossil bones of Tiktaalik, a creature with a mix of features common to fish and tetrapods.

  • EarthViewer

    EarthViewer

    Click & Learn

    Download the accompanying student worksheet under "Downloads." What did Earth look like 250 million years ago? Or 1 billion years ago? Or 4.5 billion years ago? EarthViewer is an interactive tool that allows you to explore the science of Earth's deep history.

  • Mass Extinctions: Lessons from the Past

    Mass Extinctions: Lessons from the Past

    Apps and eBooks

    Examine the history and causes of past mass extinctions, and the evidence for whether we are facing a sixth mass extinction, with this interactive eBook.

  • Animated Life

    Animated Life

    Collection

    These five short films, produced in conjunction with The New York Times, bring to life five historical scientific discoveries and the people behind them: Alfred Russel Wallace and his contribution to...

  • Mass Extinctions Interactive

    Mass Extinctions Interactive

    Click & Learn

    Discover the environmental factors that caused the five big mass extinctions in Earth’s history and which species they impacted.

  • Mass Extinction: Life at the Brink

    Mass Extinction: Life at the Brink

    Feature Film

    Five times in Earth’s past, the vast majority of plant and animal species have been annihilated in a geologic instant. What triggered these dramatic events, and what might they tell us about the fate of our world?

  • Mesozoic Film with Quiz

    Mesozoic Film with Quiz

    Interactive Video

    (33 min 43 sec) Embedded quiz modules test students’ understanding as they watch the short film on the asteroid that caused the extinction of the dinosaurs.

  • Dodging Extinction

    Dodging Extinction

    Lecture

    (31 min 12 sec) What steps can be taken to avoid the sixth mass extinction?

  • Humans, Biodiversity, and Habitat Loss

    Humans, Biodiversity, and Habitat Loss

    Lecture

    (33 min 4 sec) Human activities and their effects on biodiversity in the past, present, and future.

  • Learning from Past Extinctions

    Learning from Past Extinctions

    Lecture

    (29 min 6 sec) There is still time to avoid a sixth mass extinction.

  • The Making of Mass Extinctions

    The Making of Mass Extinctions

    Poster

    Discover the environmental factors that caused the five big mass extinctions in Earth’s history and which species they impacted.

  • Anthony Barnosky and Kaitlin Maguire Measure Mammal Extinctions at the John Day Fossil Beds

    Anthony Barnosky and Kaitlin Maguire Measure Mammal Extinctions at the John Day Fossil Beds

    Scientists at Work

    (9 min 15 sec) Prehistoric extinction rates are calculated from fossil data in a paleodatabase and compared to today’s extinction rate.

  • Biodiversity in the Age of Humans

    Biodiversity in the Age of Humans

    Lecture

    Are we witnessing a sixth mass extinction? What factors threaten ecosystems on land and in the sea? What are researchers doing to try to conserve biodiversity and ecosystems?

  • Great Transitions Interactive

    Great Transitions Interactive

    Click & Learn

    The fossils of transitional creatures were key evidence for Darwin’s evolutionary theory, but none had been found when he published On the Origin of Species. Now, there are many examples of such fossils, which clearly show that big evolutionary leaps consist of many smaller steps.

  • Film Guides: The Origin of Tetrapods

    Film Guides: The Origin of Tetrapods

    Film Guide

    The following classroom-ready resources complement Great Transitions: The Origin of Tetrapods, which tells the story of the discovery of Tiktaalik, a creature with features common to fish and four-legged animals, or tetrapods.

  • The Day the Mesozoic Died

    The Day the Mesozoic Died

    Short Film

    (33 min 43 sec) The disappearance of the dinosaurs at the end of the Cretaceous period posed one of the greatest, long-standing scientific mysteries. This three-act film tells the story of the extraordinary detective work that solved it. Also available in Spanish.

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