The conversation between human and AI assistant.
How do scientists know that Lucy is a pre-homo sapiens species, or early human, not a now extinct species of monkey?
I see. What other evidence leads scientists to believe that Lucy was a human-like species?
In addition to her skeletal characteristics, Lucy's brain also had features that are more similar to those of early humans than to those of monkeys. Additionally, the stone tools found near her fossils suggest that her species was capable of making and using tools, something that is not seen in monkeys.