1.The universe is flat according to Einstien's Theory of General Relativity. The way the universe works according to General Relativity is that the space-time is flat, and is distorted when matter appears, weighing it down and causing a sort...
1. Contrary to common belief, the Great Wall of China cannot be seen from space with the naked eye. It can be seen with aid. 2. As early as the Qin Dynasty (221-207BC) when building the Great Wall, glutinous rice...