Eratosthenes made several important contributions<span> to mathematics and science, and was a friend of Archimedes. Around 255 BC, he invented the armillary sphere.
</span>Eratosthenes is also known for his achievement in astronomy. Several astronomers and mathematicians before and after Eratosthenes<span> tried to accurately measure the circumference of the Earth, but is was </span>Eratosthenes<span> that came through. He found the circumference of the Earth to be nearly 250,000 stadia (25,000 miles).
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That the Article of Confederation was too weak gor the public
He wrote the 95 theses to protest the selling of indulgences.
True, but it depends on who you ask.
