Physical fitness and a sound mind were only part of the "right stuff" for NASA's very first astronaut.
Two Naval dolphins discover a torpedo from the 19th century. Only one other Howell torpedo is known to exist.
Since 1937, the Wright brothers' first flight has been contested by supporters of Gustave Whitehead. And they may have a case.
On January 18, 1965, Boris Volynov nearly died on his way home form orbit, and the Soviets kept it secret for over 30 years.
Cosmonaut Alexei Leonov became the first man to walk in space in 1965, but the mission almost killed him.
On September 9, 1942, Japan tried and failed to bring WWII to the continental United States.
Gagarin's background made him stand out from his cosmonaut class of brilliant and talented pilots, and helped him become the first human in space.
On this day in 1973, Motorola inventor Martin Cooper made the world's first cellphone call.
Daisy Morris was just five when she stumbled upon fossils of an unidentified species of dinosaur on the Isle of Wight. The new dino now shares her name.
John Glenn's Friendship 7 flight was just what the Soviet Union needed to regain their momentum in space.