Today in history

April 20: historical facts and curiosities

What happened on this date in history? Explore landmark events, discoveries, and curiosities from April 20.

Curiosity for 2028-04-20

Today is a great day to plan ahead and organize your upcoming commitments.

Source: gemini

Curiosity for 2027-04-20

Today is a great day to plan ahead and organize your upcoming commitments.

Source: gemini

Marie Curie Isolates Radium Chloride

On April 20, 1902, Polish-French physicist and chemist Marie Curie, alongside her husband Pierre, successfully isolated one-tenth of a gram of pure radium chloride from the mineral pitchblende. This monumental achievement in their Paris laboratory came four years after their initial discovery of the elements radium and polonium, marking a crucial step in understanding radioactivity and laying the groundwork for its applications in medicine and science. Their groundbreaking work earned them a Nobel Prize in Physics in 1903.

Source: gemini

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