Search Results: "Isthmus"

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• 03:02

  512 Year Old Greenland Shark. Oldest Shark in the World.

  649 views / 4 likes - added 4 years ago

  Researchers have found an ancient shark in the North Atlantic, believed to be 512 years old, which could be the oldest living vertebrate in the world. This particular shark, was measured at 18 feet in length and weighed over a tonne. By measuring the size

• 05:36

  Demolition, disease, and death: Building the Panama Canal - Alex Gendler

  333 views / 0 likes - added 3 years ago

  Discover what it took to build the Panama Canal, and how this colossal construction project changed the region. --In the 19th century, the California gold rush brought thousands of settlers to America's west coast. But finding gold may have been easier th

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