Nigeria, great nation with good people. God bless Nigeria, the facts are as follows: 1. The Walls of Benin (800-1400AD), in present day Edo State, are the longest ancient earthworks in the world, and probably the largest man-made structure on earth. They enclose 6500 square kilometers of community lands that connected about 500 communities. At over 16000km long, it was thought to be twice the length of the Great Wall of China, until it was announced in 2012 (after five years of meticulous measurement by Chinese surveyors) that the Great Wall is about 21,000km long. 2. The Yoruba tribe has the highest rate of twin births in the world. Igbo-Ora, a little town in Oyo state, has been nicknamed Twin capital of the World because of its unusually high rate of twins that is put as high as 158 twins per 1000 births. In a video I watched last year on YouTube presented by Titi (a white lady who speaks Yoruba), and which was centred on twin births in Igbo-Ora, one of the locals boasted that every ...