It is a place of sadness: a child perhaps 2-1/2 or 3 years old buried under the overhang of a cave, the upper part of the body once carefully wrapped in a cloth. Scientists said last week they have found the oldest-known human burial in Africa, the continent that gave rise to our species. The area dates to about 78,000 years ago at a cave called Panga ya Saidi near the Kenyan coast. Scientists called the child 'Mtoto,' which means 'child' in Swahili. The discovery explains some of the development of early social behaviors in human species, known as Homo sapiens, researchers say. Mara Martinn-Torres is the director of the National Research Center on Human Evolution (CENIEH) in Spain. She is also the lead author of the study published in the publication Nature. Martinn-Torres said the child was buried near where he lived. She added, "Only humans treat the dead with the same respect, consideration and even tenderness they treat the living. Even when we die, we continue to be someone for our group." Human species first appeared in Africa more than 300,000 years ago, later spreading worldwide. The remains of the bones were found in a round hole. They were secured in plaster and later taken to the research center for study. The researchers believe that the child was placed in the grave with his knees upward, lying on his side. It is not yet known if the child is a male or female. The body was fresh when it was buried, then quickly covered with dirt from the floor of the cave. This would likely have been a group act, perhaps by members of the child's family. All of these behaviors are, of course, very similar to those observed in our own species today, so we can relate to this act even though the burial dates to 78,000 years ago," said study co-author Nicole Boivin.