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If you see a decimal point on a speed limit sign, here's what you should do

Spotted a decimal point speed limit sign and wondered if it was real? Here's the purpose of them and what you should do. The ...
Northcountrypublicradio.org

The decimal point was in use 150 years before previously thought, research shows

NPR's Scott Simon talks to math historian Glen Van Brummelen about his finding that the decimal point appeared in the 1440s, earlier than thought. The decimal point was in use 150 years before ...
Scientific American

The Decimal Point Is 150 Years Older than Historians Thought

The decimal point was invented around 150 years earlier than previously thought, according to an analysis of astronomical tables compiled by the Italian merchant and mathematician Giovanni Bianchini ...
Live Science

World's oldest known decimal point discovered in merchant's notes from 1440s Italy

The decimal point is 150 years older than historians thought it was, newfound notes from 15th-century Italy reveal. Decimal points are so simple, it seems like they should have existed forever. These ...
WUNC

The decimal point was in use 150 years before previously thought, research shows

How did the decimal point come to be? - the dot that divides whole numbers. Historians are revising its origin story. Glen Van Brummelen studies the history of math and astronomy at Trinity Western ...