"Ancient Greek philosopher" . "Sphaerus (Greek: \u03A3\u03C6\u03B1\u1FD6\u03C1\u03BF\u03C2; c. 285 BC \u2013 c. 210 BC) of Borysthenes or the Bosphorus, was a Stoic philosopher."@en . "Sphaerus"@en .