The earliest known date for human existence is approximately 300,000 years ago. This is based on fossil evidence found in Africa, specifically in Ethiopia.
The evidence for the date of human appearance comes from fossil records, genetic analysis, and archaeological findings. Fossil records show the presence of primitive human-like species, such as Australopithecus, dating back to 4-6 million years ago. Genetic analysis also suggests that the common ancestor of all modern humans lived in Africa around 200,000 years ago. Additionally, archaeological findings, such as tools and artifacts, provide further evidence for human existence and development.
Yes, the date of human appearance has changed over time as new evidence is discovered and our understanding of human evolution evolves. For example, the earliest known date for human existence was previously thought to be 200,000 years ago, but has since been pushed back to around 300,000 years ago based on new fossil findings.
Humans evolved through a process of natural selection, where advantageous traits were passed down from generation to generation. This process allowed humans to adapt and thrive in different environments, leading to our current state as a highly intelligent and adaptable species. Additionally, cultural and technological advancements have also played a role in shaping human development.
No, there is not a definitive answer to the question of when humans appeared. The exact date of human appearance is constantly being refined and updated as new evidence is discovered. Additionally, the concept of "human" is still debated among scientists, making it difficult to determine a specific date for our appearance as a species.