Complex sentence: The Leakey's excavation was one of the earliest to uncover ancient beads and tools in the area and a later investigation in 1950 was the the first to use radiocarbon dating in East Africa.
Split into simpler sentences: The Leakey's excavation was one of the earliest to uncover ancient beads and tools. A later investigation in 1950 was the the first to use radiocarbon dating in East Africa.