Eratosthenes Measured Earth’s Circumference—Centuries Before Columbus Sailed
Mathematics / Geometry
Eratosthenes (c. 276 – 194 BC) was born more than 2200 years ago in the Greek city of Cyrene, now a city in the North African country of Libya. (The Greek Empire surrounded much of the Mediterranean S continue reading this fact

What Are Squares And Square Roots?
Mathematics / Algebra
The mathematical term 'square' comes from the twodimensional shape of the same name. A square shape has the two dimensions of length and width, both exactly the same and at angles of 90 to each other continue reading this fact

Leaps and Bounds
Mathematics / History
Leap years are years with 366 days, instead of the usual 365. Leap years are necessary because the actual length of a year is 365.242 days, not 365 days, as commonly stated. Basically, leap years occu continue reading this fact
