Maintaining his atomic theory throughout, Democritus introduced the hypothesis of images or idols (eidola), a kind of emanation from external objects, which make an impression on our senses,

Democritus of Abdera is best known for his atomic theory but he was also an excellent geometer. Very little is known of his life but we know that Leucippus was his teacher. ... More info About: Democritus,

Democritus of Abdera is best known for his atomic theory but he was also an excellent geometer. Very little is known of his life but we know that Leucippus was his teacher. ... More info About: Democritus,

The Many Worlds and existence of extraterrestrial life theory of Democritus, Epicurus and others...

Democritus' theory had no place for the notion of purpose and the intervention of gods in the workings of the world. He even held that mind and soul is formed by the movement of atoms.

Although the evidence is not certain, Democritus may be the originator of an ancient theory about the historical development of human communities. ... Democritus, c.460-c.370 BC,

Democritus (about 460 BC-about 370 BC) ... Democritus was a Greek scholar who is best known for his atomic theory although he was also an excellent geometer.

Works of Democritus ... Democritus was an original thinker in ethical theory, setting high standards of personal integrity and social responsibility, without invoking supernatural sanctions.

Leucippus's atomic theory was further developed by his disciple, Democritus, (the subject of our story) who concluded that infinite divisibility of a substance belongs only in the imaginary world...

Molecules in liquids and gases do not stay in the same place, but move about constantly. ... The motion of an individual molecule in a dense fluid does not follow a simple path. ... As it travels,