How an ancient Greek mathematician calculated the Earth's circumference. In the mid-20th century, we began launching satellites into space that would help us determine the exact circumference of ...

To get the last piece of the puzzle, Eratosthenes paid a guy to actually pace out the distance between the two cities. Et voila! He had all he needed to calculate the circumference of the Earth.

The idea of a spherical Earth was floated around by Pythagoras around 500 BC and validated by Aristotle a couple centuries later. If the Earth really was a sphere, Eratosthenes could use his ...

Living around 250 BCE, Eratosthenes was the first to develop an accurate method for measuring the circumference of the Earth. And like all great theorists before and since, he didn’t even need ...

By this means he found that the circumference of the earth was 250,000 stadia, according to Cleomedes, ... Nature - Eratosthenes and the Circumference of the Earth. Skip to main content.

50 comments telling me the earth is Flat. And hence, it’s compelled me to make a short video, with a history spin, because this is a belief that was meant to have died out more than 2,000 years ago.

This, again, is because the Earth is round, and not flat. Eratosthenes (276-194 BCE) used this principle to calculate the circumference of the Earth quite accurately.

Traditionally, the solstice marks the longest day and the start of summer. The event has fascinated civilisations for ...

There are 13 countries that sit on Earth's equator. Can you get them all in 5 minutes? If so, ... Eratosthenes became the first person to work out the circumference of the planet.

The flat Earth conspiracy ignores the problems with its own claims and tries to open a debate that's been settled for more than 2,000 years. ... An ancient scholar named Eratosthenes, ...