◆ On this day

April 16

3 sourced moments from April 16 in history: Why Queen Anne knighted Isaac Newton in 1705; LSD's effects were discovered by accident on April 16, 1943; and The Texas City disaster killed nearly 600 in a ship explosion (1947).

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3 things happened on April 16

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1947 Earth & Climate · Natural Disasters

The Texas City disaster killed nearly 600 in a ship explosion

A shipboard fire detonated 2,300 tons of fertilizer, leveling a Texas port in the deadliest industrial accident in US history.

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1943 Science · Chemistry

LSD's effects were discovered by accident on April 16, 1943

Albert Hofmann's first LSD trip was accidental. His famous 'Bicycle Day' dose three days later was about ten times what's needed to feel it.

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1705 Science · Physics

Why Queen Anne knighted Isaac Newton in 1705

Newton became Sir Isaac on 16 April 1705. Party politics likely mattered more than physics, and a 2015 archive find adds a coronation medal to the story.

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