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Time Team America Time Team America | Topper, South Carolina | Topper: Day 3

Time Team America | Topper, South Carolina | Topper: Day 3 The geophysics results are presented and the ... The geophysics results are presented and the team learns about the Clovis Comet. (17:19)

  • Duration: 17:19
    Copyright Copyright 2009 Oregon Public Broadcasting
    TV Rating: NR

NOVA NOVA | Last Extinction | Who or What Did It?

NOVA | Last Extinction | Who or What Did It? Hunters? Climate change? Or did a comet kill ... Hunters? Climate change? Or did a comet kill off the mammoths and other "megafauna"? (9:23)

  • Duration: 9:23
    Copyright 2009 WGBH Educational Foundation
    TV Rating: TV-PG

NOVA NOVA | Last Extinction | Jewels in the Earth

NOVA | Last Extinction | Jewels in the Earth Millions of tiny diamonds may provide support... Millions of tiny diamonds may provide support for the comet hypothesis. (8:51)

  • Duration: 8:51
    Copyright 2009 WGBH Educational Foundation
    TV Rating: TV-PG

NOVA NOVA | Last Extinction | A Furious Debate

NOVA | Last Extinction | A Furious Debate How strong is the evidence for the comet and ... How strong is the evidence for the comet and "overkill" theories? (8:19)

  • Duration: 8:19
    Copyright 2009 WGBH Educational Foundation
    TV Rating: TV-PG

NOVA NOVA | Last Extinction | Where's the Crater?

NOVA | Last Extinction | Where's the Crater? Skeptics point out possible problems with the... Skeptics point out possible problems with the comet theory. (6:56)

  • Duration: 6:56
    Copyright 2009 WGBH Educational Foundation
    TV Rating: TV-PG

NOVA NOVA | Last Extinction

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)

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6 Video Results