Here's how we know humans share a common ancestor with apes:
* Fossil evidence: Paleontologists have unearthed numerous fossils of extinct hominids, which are closely related to humans. These fossils show a clear evolutionary progression from earlier, ape-like creatures to more human-like ones. For example, "Lucy" (Australopithecus afarensis) is a famous fossil that exhibits both ape-like and human-like characteristics.
* Genetic similarities: The DNA of humans and apes, especially chimpanzees, is remarkably similar. The genetic difference between humans and chimps is less than 2%, demonstrating our close evolutionary relationship.
* Anatomical similarities: Humans and apes share many anatomical features, such as the presence of five fingers and toes, a grasping hand, and a relatively large brain. While the details of these structures may differ, their basic similarities point to a common ancestor.
* Behavioral similarities: Humans and apes share some complex social behaviors, such as the use of tools, the ability to learn and communicate, and the formation of strong social bonds.
It's essential to understand that evolution is a gradual process that takes place over millions of years. We don't see a direct lineage of humans evolving *from* apes, but rather a shared ancestry with a gradual divergence over time. This understanding is supported by a vast amount of scientific evidence from multiple disciplines.