You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "who measured the earth with sticks and shadows?" whose answer is Eratosthenes.
Each document should contain about 30 words, and these documents should contain useful information.

Query: who measured the earth with sticks and shadows
Useful Output:

Doc 1: Eratosthenes calculated the circumference of the Earth by measuring the degrees of the shadows cast at two different places "Syene" and "
Doc 2: Eratosthenes, a Greek mathematician and astronomer (276 BC), measured of Earth's circumference by using the shadow angles from the sun in two locations.
Doc 3: eratosthenes #noshadowday #earth #space How an historic Greek mathematician calculated the Earth's circumference during zero shadow day.
Doc 4: A Greek man named Eratosthenes successfully proved that the Earth is round and even went on to measure the circumference of the Earth with the help of just a
Doc 5: The Greek philosopher Aristotle (384-322 BC) is credited as the first person to try and calculate the size of the Earth by determining its circumference.