That man was Eratosthenes. A Greek mathematician and the head of the library at Alexandria. Eratosthenes had heard that in Syene, a city south of Alexandria, no vertical shadows were cast at noon ...

That man was Eratosthenes. A Greek mathematician and the head of the library at Alexandria. Eratosthenes had heard that in Syene, a city south of Alexandria, no vertical shadows were cast at noon ...

About 2,250 years ago, there was a man called Eratosthenes. He was one of those ancient Greeks who changed the world. He was a polymath, someone with expert knowledge of a range of topics.

It was around 250 BCE when Eratosthenes was a librarian in the famous library of Alexandria He discovered in his reading that there was a yearly festival in the town of Syene (modern Aswan) on June 20 ...

I implemented the Sieve-of-Eratosthenes on an ARM chip. If you haven’t heard of the Sieve of Eratosthenes then you really need to work your way through Project Euler. That’s where I first ...

mathematics number theory prime numbers twin primes conjecture All topics More than 2,000 years ago, the Greek mathematician Eratosthenes came up with a method for finding prime numbers that continues ...

Habes has an article which describes the method adopted by Eratosthenes for measuring the circumference of the earth. He knew that the sun threw no shadow at the summer solstice at Syene (the ...

An open letter to Galileo from Ferdinand Magellan, Sir Francis Drake and Eratosthenes: Enjoyed Alexandra Petri's March 28 op-ed column "An open letter from Galileo to Ted Cruz." For us ...