Ancient mammoth tooth
This shell is thought to be the oldest known seashell instrument
Signage in Tuskegee, Alabama
Five members of the Founding Fathers
A fossilized tree is seen at the Petrified Forest National Park on the island of Lesbos, Greece.
A statue is displayed at the museum Antiquarium in Pompeii
A monkey going through a pre-flight test in 1959
In this 1963 file photo, the Rev. Dr. Martin Luther King Jr speaks to thousands of people.
A fragment from the Dead Sea Scrolls
Ruins of a Roman archaeological site discovered in Amman, Jordan