August 23, 1799 – Napoleon leaves Egypt for France en route to seize power.
August 24, 79 – Mount Vesuvius erupts. The cities of Pompeii, Herculaneum, and Stabiae are buried in volcanic ash.
August 25, 1609 – Galileo Galilei demonstrates his first telescope to Venetian lawmakers.
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August 27, 2003 – Mars makes its closest approach to Earth in nearly 60,000 years, passing 34,646,418 miles (55,758,005 km) distant.
August 28, 1833 – The Slavery Abolition Act 1833 receives Royal Assent, abolishing slavery through most the British Empire.