Orangutans have the slowest known life histories of any mammal. They take the longest time to grow up and they are the slowest to reproduce. The female orangutanâs menstrual cycle is 29 to 32 days, with menstruation lasting three to four days. The gestation period is approximately eight and a half months. Usually a single offspring is born, weighing about 3 Â½ pounds.
Category:Human remains (archaeological) Human remains are an important type of artefact studied by archaeologists. Human remains provide direct evidence of human existence and scientific study can yield information on aspects of their lifestyle including diet, disease, age at death and injuries suffered during their lifetime. Subcategories.
The oldest fossil remains of anatomically modern humans are the Omo remains, which date to 195,000 (Â±5,000) years ago and include two partial skulls as well as arm, leg, foot and pelvis bones.ater, around 50,000 years ago, humans then adopted modern behaviors. This hypothesis is based on the record of fossils and biogenic substances from periods before 50,000 years ago and the human artifacts found after 50,000 years ago.