Euclidean geometry assumes parallel lines never intersect,
which is true of latitudinal lines on a globe, but not true of
longitudinal lines. Today we know that all space is curved.
Einstein showed that physical space affected by gravity is
The first Greek to divide a circle into 360 degrees was
Alexandrian numerals were similar to Roman numerals, an
additive decimal system with values given to letters of the Greek
alphabet. The Greek letter Epsilon (Ε) was 5; Nu (Ν)
was 50; Phi (Φ) was 500, so that ΦΝΕ (added
together) was 555.
See also in The book of science:
Readings on wikipedia: