The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
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Scientists are excavating the ruins of a major civilization which pre-dates both the pyramids and Stonehenge by over 7,000 years. In 15 years, they have uncovered only about 5% of the site.
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During the Cold War, the US had planned to detonate a nuclear weapon on the moon.
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The U.S. motto, 'In God We Trust', was not adopted as the national slogan until 1956.
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No one knows how many people died during the sinking of the Titanic.
11
In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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Harry S. Truman was the last U.S. President with no college degree.
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