Sir Isaac Newton gained a master’s degree from Trinity College, Cambridge, England.
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'Harry Potter and the Deathly Hallows – Part 2' premiered in London.
NASA's Opportunity Mars rover launched from the Florida Cape Canaveral Space Force Station.
The world celebrated the introduction of sliced bread for the first time.
Dutch artist Wilfred Stijger broke the world record for the tallest sandcastle.
Construction began on the Hoover Dam in Nevada.
