Bion of Abdera (c. 430 – 370 BC)^[1] (Greek:Βίων ὁ Ἀβδηρίτης,gen. Βίωνος) was aGreekmathematician andastronomer ofAbdera, Thrace, and a pupil ofDemocritus.Strabo refers to him as an astrologer.^[2] He wrote both in theIonic andAttic dialects, and was the first who said that there were some parts of the Earth in which it wasnight for six months, while theremaining six months were one uninterrupted day.^[3][4] He also engaged in correlating the direction ofwinds withclimate and is believed to have traveled to distant regions.^[5]

•  This article incorporates text from a publication now in thepublic domain: Smith, William, ed. (1870)."Bion".Dictionary of Greek and Roman Biography and Mythology. p. 488.
• Aikaterini Balla.«Βίων - από την Αικατερίνη Μπάλλα, Οδηγός Ανατολικής Μακεδονίας και Θράκης» (Guide to Eastern Macedonia and Thrace, Bion) (in Greek).

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