What is the fine-grained topic of the following text: Saman Heydari-Guran, the head of the excavation team, said the object is a milk tooth belonging to a six-year old Neanderthal kid, which was found along with several stone tools from the Middle Paleolithic period — between 125,000 and 40,000 years ago. Only return the topic.
Discovery of a Neanderthal kid's milk tooth and stone tools from the Middle Paleolithic period.