In addition, Archimedes proved that the volume of a sphere is two-thirds the volume of a circumscribed cylinder. He considered this proof his greatest accomplishment and even requested that a ...

Describes how Archimedes tried to estimate the number ... Assume that a grain of sand is basically a sphere, with a radius of 0.025 cm. The volume of a sphere can be found using the formula ...

This story appears in the March 2017 issue of National Geographic magazine. Technically it’s ancient technology. But now the two-millennia-old principle of the Greek mathematician Archimedes has ...