According to the BBC, scientists at Cambridge University, identified the age of the authors of the ancient rock paintings in the Cave of hundred mammoths in western France. According to scientists, the age of young artists, which lived more than ten thousand years ago- no more than seven years, the age was established based on the height of the figures and features of children's drawing that are unique to children. Children's drawings unlike adults lack of colors, so it seems, that children are often depicted in ancient times, just for fun, not for send any messages.