Why are veins blue?

Published: Feb. 3, 2015, midnight

Brought to you by the No. 31, but why? What\u2019s so special about the phrase \u201cthe five boxing wizards jump quickly\u201d Why are veins are blue, and where does the phrase blue blood come from? In Twitter Time this week ... \u201cIf we quantum teleported a camera 150 million lightyears away, took snaps of earth, then teleported it back. Would we see dinosaurs?\u201d