text: 1-at early past how man or any oather animal born in this world? 2- what do u think how long our world exist? pls ans two ques separately  and mention how born animal not only man i'm not quite sure what you're asking, but i think you are looking for the dates at which various animal groups (including humans) evolved?  the oldest fossils of homo sapiens sapiens come from the klasies river mouth in south africa, and are dated to about 100,000 years ago.  from there, modern humans spread out to reach all around the globe.  the earliest member of the genus homo was homo habilis (aka 'handy man').  this was the first hominid definitively linked with stone tool manufacture and use.  the earliest finds are in east africa (kenya, tanzania) and are about 1 million years old.  the earliest hominids are the australopithecines, such as australopithecus afarensis.  one of the most famous is the skeleton known as 'lucy'.  also found in the region of east africa, the earliest fossils date to about 3.5 million years ago.  fossil trackways such as the laetoli footprints take this date back to perhaps 5 or 6 million years ago, and there is some other evidence that they may have evolved 9 or 10 million years ago.  the earliest primates are late cretaceous in age, about 65 million years old (about the same time the dinosaurs went extinct).  the earliest mammals are known from the triassic (about the same time the first dinosaurs evolved) about 210 million years ago.  the first reptiles appeared about 310 million years ago.  the first amphibians emerged on land about 360 million years ago.  the first fishes show up about 520 million years ago, and the very first chordates during the cambrian explosion about 570 million years ago.  the earth itself is 4.5 to 4.6 billion years old.  all of these dates have been arrived at through scientific radiometric dating techniques, as well as stratigraphic corellation.