The Koursk, a missile-carrying nuclear submarine, was the pride of the Russian navy. No one expected problems with such a sophisticated vessel. But on August 12th 2000, everything and everyone aboard Koursk would plummet to the bottom of the Barents Sea.
In 1940, the world held its breath waiting to see how two innovative fortifications by the French and Germans would withstand World War II. The French's Maginot Line was an ambitious and admired concept of its day. To compete, Hitler launched the construction of his own wall, the Siegfried Line.
Dolphins are intelligent and have advanced memory skills allowing them to easily learn commands. With sonar, dolphins can locate objects underwater even in poor visibility. Humans have been fascinated by them for centuries, especially those in the military who wanted to turn them into weapons.