•---Ancient+times+(450+AD+and+years+prior)

__Democritus 450 B.C.__ Democritus was born 460 B.C. in Adbera, a Greek City on the Northern Coast of the Aegean Sea. When his father died he went on a journey to learn where he visited many places like Egypt, Persia, and India. After years of traveling, he returned to his home town of Adbera. When he returned, he gave public lectures. He became famous for explaining the natural occurrences of the weather and also there patterns. He thought that atoms were impenetrable and that they had a density equal to their volume. Also, his theory stated that the atoms themselves were unchanged, but they move around in space to form different objects. Below is a small, spherical, solid, indivisible, model. //The small, spereical, solid, indivisible model above is how Democritus imagined what an atom would look like. Democrtius and other Greek scientists believed that this is the smallest most simplest form of an atom even if you keep dividing it in half over and over again.// This photo on the rigt from [] This photo on left from []

__Leucippus 400's B.C.__ Leucippus was the first to propose the atomic theory of matter. During this time period the Greeks were trying to figure out the way matter was created. He belived that after dividing substances over and over you will eventually get to a small particle which cannot be further divided. There is little known on Leucippus life but he was a founder of a school in Abdera. He was born in 500 B.C. and died in 450 B.C. This photo from []

__Aristotle 384-322 B.C.__ Aristotle was born 384 B.C. in Stagria Northern Greece. Aristotle was a student of Plato, a famous Greek philosopher and mathematician. Aristotle went to Athens with the approval of Alexander the Great in 335 B.C. Aristole was a teacher to Alexander the Great. In Athens he created his own school where he spent most of his life researching and teaching. Also, during this time period Alexander the Great was pursuing wars and conquering land. One of his victories was over Darius' Persian armies. Aristotle believed there were only four elements earth, air, fire, and water. Also, that they had some of the smallest units that made all matter. This photo from []