Olduvai Gorge is a significant archaeological site located in Tanzania. It is often referred to as the "Cradle of Mankind" due to the discovery of some of the earliest human fossils and tools. The gorge is about 48 kilometers long and has been a key location for understanding human evolution, dating back nearly 2 million years. The site was first explored by Louis Leakey and his family in the 1930s. They uncovered important hominid remains, including those of Homo habilis and Homo erectus. These findings have provided valuable insights into the development of early human ancestors and their way of life.