PRX - Pieces for Topic: Environment

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Caption: Scientists discovered the "sound channel" in 1944. Whales use it to communicate across oceans — and during the Cold War the Navy secretly used it to track nuclear subs. This 1948 graphic shows sound traveling on an axis 700 fathoms down in the Atlantic., Credit: Maurice Ewing and J. Lamar Worzel
Something unusual happens about a half mile under the sea. Ocean physics create a special zone where sound travels for hundreds, even thousands of ...

Bought by KUFM - Montana Public Radio, New Hampshire Public Radio, American Voices, Hark!, KFAI Minneapolis and more


  • Added: Aug 26, 2014
  • Length: 11:11
  • Purchases: 11
Caption: Moosewatch volunteer Dave Beck holds up a marked antler. Team leader Jeff Holden looks on. They mark the antlers and hang them in a tree so others know the antler has been found and documented., Credit: Mark Brush
Wolves and moose are at the heart of the world’s longest running study of a predator and its prey. The drama unfolds on Isle Royale National Park ...

Bought by Delta College Public Radio and WTIP


  • Added: Jan 24, 2013
  • Length: 03:47
  • Purchases: 2
Caption: Rolf Peterson on Caribou Island, one of more than 450 smaller islands in the national park's archipelago., Credit: Mark Brush
Researchers have studied the wolves and moose on a remote island archipelago in Lake Superior for 54 years. These days, the wolves are in trouble.

Bought by Delta College Public Radio and WTIP


  • Added: Jan 24, 2013
  • Length: 04:00
  • Purchases: 2
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Stand on a street corner at dawn in Newmarket, England and you'll see a spectacle unique in the world: 3,000 racehorses parade through town every d...

  • Added: Apr 22, 2010
  • Length: 05:38
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Why do humpback whales sing? Some researchers are trying to solve that mystery as they take you on a wild adventure in Hawaii. Experience some cl...

Bought by PRX Remix, Here and Now, 90.9 WBUR - Boston's NPR News Station, The Nature Podcast, KRCC-FM and more


  • Added: Mar 14, 2007
  • Length: 09:49
  • Purchases: 6