Life is full of surprises;

even two parallel lines may one day meet...(向左走向右走)

有一日,我收到一個Message,it saids:

In the early 1800s some mathemematicians

a lot cleverer than me discovered that in fact

it was impossible to prove that parallel lines

will never meet using the tenets (axioms) of

geometry, in fact there are 2 other types of

(Non-Eucidean) goemetry where parallel line

actually do meet!