Final answer:
Homo erectus was a larger species of hominin that appeared 1.8 million years ago. They had physical characteristics similar to modern humans, such as larger size and a human-like gait. They also had primitive features like bigger jaws and teeth, a sloping forehead, and a small brain size compared to modern humans.
Step-by-step explanation:
Homo erectus, an early species in the Homo genus, appeared about 1.8 million years ago. They were larger in size, reaching heights up to 1.85 meters and weighing up to 65 kilograms, similar to modern humans. They had bigger jaws and teeth, a sloping forehead, and a relatively small brain compared to modern humans. Additionally, Homo erectus had a nose with downward-facing nostrils, walked with a human gait, and used fire, hunted, and had a home base.