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Season 24, Episode 4

  • Aired: 10/25/2012
  • 28:50
  • Rating: TV-G
Yellow Tuft Alyssum - A new invasive species from Europe has been introduced in the Illinois River valley. Mt. Hood's Volcanic Past - Mt. Hood is an active volcano with a history of relatively recent eruptions. Warren Falls - A man-made waterfall in the Columbia Gorge blocks a natural fall. One man wants to end that.
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Season 24, Episode 4
Yellow Tuft Alyssum; Mt. Hood's Volcanic Past; Warren Falls
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