German U-Boat Type XXI: Were a class of German diesel-electric submarines designed during the Second World War. They were the first submarines able to operate primarily submerged rather than spending most of their time as surface ships.
Fire engines are specifically designed to fight fires and often include a larger telescopic-ladder mounted on a turntable at the back of the truck's chassis. Most also include a water tank with an onboard pump, a fire hose, an aerial ladder and multiple ground ladders.
The most widely produced and strategically important British single-seat fighter of World War II. The Spitfire, renowned for winning victory laurels in the Battle of Britain (1940-41), served in every theatre of the war and was produced in more variants than any other British aircraft.
Pteranodon is a genus of pterosaurs which included some of the largest known flying reptiles with wingspans over 6 meters. They lived about 80 million years ago in North America in present day Kansas, Alabama, Nebraska, Wyoming, and South Dakota.
The name from Greek means 3 horned face. This dinosaur was about 30 feet long, 10 feet tall and weighed 4 to 6 tons. Stout limbs supported its girth but it was unlikely the dinosaur could move very quickly. Like a modern-day rhinoceros, it probably spent much of its time grazing on plant matter.
The stegosaurus was an armored dinosaur that lived about 150 million years ago. It had a heavily rounded back, short forelimbs, head held low to the ground and a stiffened tail held high in the air. The double plates along its back were most likely used for defense and may also have regulated its temperature. Stegosaurus weighed about 6,800 pounds and was 9 feet tall.