A National Look at the Use of Congregate Care in Child Welfare. congregate care.
The idea of a spherical Earth appeared in Greek philosophy with Pythagoras (6th century BC), although most pre-Socratics (6th â 5th century BC) retained the flat Earth model. Aristotle provided evidence for the spherical shape of the Earth on empirical grounds by around 330 BC.
The Myths. 1  Everyone in the Middle Ages thought the earth was flat. 2  Columbus faced opposition to his attempt to find a western route to Asia because people thought the earth was flat.