How old are humans on earth?

Anatomically modern humans (Homo sapiens) have existed for approximately 300,000 years, based on the oldest fossils discovered in Morocco. However, the broader human genus (Homo), which includes our extinct relatives like Homo erectus and Homo habilis, has been present on Earth for roughly 2 to 3 million years. This distinction matters because it separates our specific species from the larger evolutionary family of human-like beings who walked upright, used tools, and exhibited increasingly complex cognitive abilities.

The timeline of human presence becomes even more nuanced when considering behavioral modernity versus anatomical modernity. While humans with bodies essentially identical to ours existed 300,000 years ago, archaeological evidence suggests that fully modern human behavior—including sophisticated language, symbolic art, complex tools, and advanced social structures—emerged more recently, around 70,000 to 100,000 years ago. From that point, humans began migrating out of Africa and eventually populated every continent except Antarctica, developing diverse cultures and technologies. In the context of Earth's 4.5 billion-year history, humans represent an incredibly recent arrival, occupying less than 0.01% of the planet's existence, yet our impact on ecosystems and the geological record has been so profound that many scientists propose we've initiated a new geological epoch called the Anthropocene.