The Creator of Naruto wanted to show that he had two personalities, making have two faces, causing him to quarrel with himself.
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cone
light face and dark face.Actually it is phase not face. They are light reaction and dark reatcion
The intersection of two or more solids can either be an empty set, a point (two cones "intersecting" apex-to-apex), a line (two cubes touching along one edge), a face (two cubes, face-to-face). If the solids are "filled", the overlapping intersection will be another solid. If they are hollow, it will be a closed three dimensional figure.
pages 56 and 57
Zetsu is half white and half black because (SPOILER ALERT) white Zetsu is an artificial life form that was created by Madara Uchiha with Hashirama Senju's DNA. When Madara was dying (the proper one, if you didn't know, not the re-encarnated one or Tobi/Obito pretending to be him) he infused part of his will into White Zetsu, creating his other personality, Black Zetsu.
Zetsu is still alive, for now.
Zetsu is a cannibal he eats humans.
Zetsu was created from Hashirama Senju's cell.
Sasuke killed Zetsu, It's highly debated that Zetsu was pulling off a Bunshin however.
naruto is way stronger zetsu can't fight
Zetsu likes pie,but only human flavor.
There is no official information available about Zetsu's birthday.
Yes, Zetsu is a medical ninja but you don't see him do it though.
Konan found zetsu too be usefull. by that I mean he can be a spy for her.
Zetsu's Ring Has The Word Kai (Boar) Its A Hand Sign
Kishimoto Masashi (author) had originally planned for the akatsuki to be a group of monsters and each character represented something (zetsu = Plant) zetsu was one of them. But he changed the idea of the akatsuki, and he like Zetsu so much he decided to keep him.