Transcript: The early Greek philosophers had none of the tools of modern science.  They did not have the machines with which to probe the atom.  They did not have telescopes. They didn't have modern technology of any kind, and yet with logic and mathematics they were able to make some striking speculations and discoveries about their universe.  They speculated as to the existence of atoms.  They speculated that the Earth was round and imbedded in a large cosmos.  They speculated as to the true nature of eclipses and the cause of the seasons.  These speculations were born out by fact many hundreds of years later.