Bion of Abdera
Bion of Abdera (Greek: Βίων ὁ Ἀβδηρίτης) was a Greek mathematician of Abdera, Thrace, and a pupil of Democritus.
He wrote both in the Ionic and Attic dialects, and was the first who said that there were some parts of the earth in which it was night for 6 months, while the remaining 6 months were one uninterrupted day.
Moreover, he wrote on meteorology, but none of his writings survive.
Sources
Diogenes Laertius, IV.58.
Smith, William. Dictionary of Greek and Roman Biography and Mythology (1870), "Bion of Abdera".
[1]
Additional Source
[1] "Ancilla to the Pre-Socratic Philosophers: A Complete Translation of the ..." by Kathleen Freeman
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