there was a time when people believed that the earth was flat. however they were proved wrong. the earth is a sphere and it consists of 3 layers. the inner most layer is apparently very hard. ha ha ha. people believe any crap if it is "scientifically" proved. i say the earth is hollow inside and there is a giant blue rat inside running, causing the earth to rotate. laughing at me? ha ha. even they did that when they were told, the earth isnt flat .