The submarine is a naval vessel that travels below the surface of the water. Submarines were first used in warfare during World War I, 1914 to 1918. In the time since they have captured our imaginations and often appear in popular culture, including live-action films, music, and children's cartoons. We've even named the "sub" sandwich after them... Read more
Sailboats or sailing ships are "propelled partly or entirely by sails" that catch the wind. Sailboats are also known as sloops, cutters, catboats, dinghies, ketches, schooners, and yawls, depending on their design... Read more
The tank is a heavily armoured military combat vehicle that crawls along on tracks. The armor protects the soldiers inside. The chain-like tracks allow it to travel over difficult terrain. Tanks are often heavily armed with very large guns... Read more
The canoe is a lightweight boat that is powered and steered by paddles. Canoes have been used all over the world for millennia. The native peoples of the Arctic used canoes called kayaks, that consisted of animal skins stretched over wooden or bone frames. Dugout canoes - those carved from a fallen log... Read more
A kayak is a small boat or canoe. The kayak traces its history to the native peoples of Greenland and Alaska. These kayaks were made of animal skins stretched over frames of wood or whalebone. They were used for fishing and hunting. The word kayak means "man's boat" or "hunter's boat."... Read more
Police are "officers representing the civil authority of government." They typically 'maintain public order and safety, enforce the law, and prevent, detect, and investigate criminal activities.'... Read more
Indy cars are a special type of racecar. The cars are open-wheeled and single-seated, similar to Formula One cars. Races may be held on circular tracks, streets, or off-road... Read more
The motorcycle or motorized bicycle was invented in Britain in 1884. In the time since many different types of motorbikes have been developed for different uses. The dirt bike is one of them... Read more
A UFO or unidentified flying object is "any aerial object or optical phenomenon not readily identifiable to the observer." The first UFO sighting of a "flying saucer" occurred in 1947, when a pilot reported several fast-moving objects. He described them as moving "like saucers skipping on water," and thus the flying saucer was born... Read more
The Vikings were a seafaring people known for being fierce warriors. They raided villages and built colonies throughout Europe - and according to some researchers, as far away as North America - during the ninth to eleventh centuries. The term "Viking" meant "pirate." Vikings were also known as Norsemen or Northmen... Read more
