In the late 1930s, aviator Amelia Earhart mysteriously vanished on her flights around the globe. See original newspaper reports at the time of her disappearance and a look back at the mystery 25 years later.
The first article here takes a look back at the Lewis and Clark Expedition, 100 years later, from 1905.
How did America get its name? The man from whom the continents got their names was an especially fascinating character of the late 15th century.