Casts Quote by Marcus Vitruvius Pollio

“For the observed difference in the shadow lengths, the distance between Alexandria and Syene had to be about seven degrees along the surface of…

— Carl Sagan

“From the shadow length in Alexandria, the angle A can be measured. But from simple geometry (“if two parallel straight lines are transected by…

— Carl Sagan

The object of geometry in all its measuring and computing, is to ascertain with exactness the plan of the great Geometer, to penetrate the…

— Benjamin Peirce

I measured the skies, now the shadows I measure, Sky-bound was the mind, earth-bound the body rests. [Kepler's epitaph]

— Johannes Kepler

And here Dante describes an evidently spherical world... "The lamp of the world [the sun] rises to mortals through different passages; but through that…

— Dante Alighieri

“it is clear that in the study of beings this aim can be fulfilled by us perfectly only through successive examinations of them by…

— George F. Hourani

“ Euclid 's Elements has been for nearly twenty-two centuries the encouragement and guide of that scientific thought which is one thing with the…

— William Kingdon Clifford

“The Sun is 93 million miles from Earth. In 1610, Galileo observed sunspots on its surface, proving that the Sun was rotating and at…

— Stewart Stafford

“Every single cell in the human body replaces itself over a period of seven years. That means there’s not even the smallest part of…

— Steven Hall

While most of those who hold that the whole heaven is finite say that the earth lies at the center, the philosophers of Italy,…

— Aristotle

The science of the church is neglected for the study of geometry, and they lose sight of Heaven while they are employed in measuring…

— Edward Gibbon

“Yet there have been and still are mathematicians and philosophers who doubt whether the whole universe, or to speak more widely, the whole of…

— Fyodor Dostoyevsky