Top 10 'Unsolved' Mysteries That Have Been Solved

Did Anastasia Escape the Bolsheviks: Anna Anderson (shown in 1926) claimed she was really Anastasia Romanov. It was conclusively proven in 2007 that she was not.

What's the Secret of the Bermuda Triangle: The Bermuda Triangle allegedly stretches between Florida, Bermuda and Puerto Rico. But experts have found no unexplained.

Why Did the Mayan Civilization Collapse: We now know the Mayan civilazation collapsed from environmental factors.

Was 'Umbrella Man' Involved in the JFK Assassination: Umberella man' is shown allegedly giving the signal for President John F. Kennedy's assassination.

Where Did Stonehenge's Giant Stones Come From: It took 400 years to definitively prove that the Stonehenge stones came from Wiltshire, some 15 miles away.

What Happened to the Franklin Expedition: This engraving depicts the end of the Franklin Expedition.

What Causes the 'Sailing Stones' to Move: The stones in Death Valley, some as big as 700 pounds, seem to move on their own, leaving long tracks behind them.

What Caused the Tunguska Blast in 1908: In 2013, researchers were finally able to prove that the blast that flattened the Siberian Taiga forest in 1908.

How Did King Richard III Die: King Richard III was killed during the Battle of Bosworth Field, during the Wars of the Roses in 1485. His remains were found in 2012.

How Were the Pyramids Built: For centuries people wondered how the ancient Egyptians were able to build the pyramids. In 2014, physicists determined.

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