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Tech Time Machine: 15 April

Which day in history features the birth of Leonardo da Vinci, the sinking of the Titanic and the publication of Samuel Johnson's A Dictionary of the English Language? Today, of course.

Now playing: Watch this: Tech Time Machine: 15th April
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Which day in history features the birth of Leonardo da Vinci, the sinking of the Titanic and the publication of Samuel Johnson's A Dictionary of the English Language? Today, of course.

We delve into Leonardo's amazing life, and wonder why so many died aboard the unsinkable ship on today's Tech Time Machine.