A Mini-Submarine Discovers Classified Canadian Technology at the Bottom of Lake Ontario

The Arvo Arrow

This prototype was nicknamed the “Arvo Arrow,” it was roughly 9 feet long and had a wingspan of 5 feet across. This rocket flew using solid fuel, and once that fuel was used up or the rocket collided with something, the artillery shell would explode.

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The More You Know

  • An oyster's sex is fluid.
  • The word "muscle" comes from a Latin term meaning "little mouse."
  • The world record for the tallest stack of doughnuts totaled more than 3,000.
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