Final answer:
Homo erectus shared close similarities with modern humans, including the use of sophisticated tools, fire, and cooperation, as well as caring for the sick and elderly. They lived until about 50,000 years ago and had a larger brain size and a nose with downward-facing nostrils.
Step-by-step explanation:
The evidence from the Nariokotome Boy suggests that Homo erectus shared close similarities with modern humans. They were about the same height, made and used sophisticated stone tools, relied on fire, constructed huts, worked cooperatively, and cared for the sick and elderly. Homo erectus populations lived until about 50,000 years ago and exhibited a larger brain size, a nose with downward-facing nostrils, and the ability to use fire for cooking and hunting.