2025年2月11日 · human evolution, the process by which human beings developed on Earth from now-extinct primates. Viewed zoologically, we humans are Homo sapiens, a culture-bearing upright-walking species that lives on the ground and very likely first evolved in Africa about 315,000 years ago.

2025年1月17日 · Geologic time, the extensive interval of time occupied by the geologic history of Earth. Formal geologic time begins with the Archean Eon (4.0 billion to 2.5 billion years ago) and continues to the present day. Modern geologic time scales also include the Hadean Eon (4.6 billion to 4.0 billion years ago).

The study of human origins, or beginnings, involves figuring out how and when human beings began to exist. Scientists have many different theories about human origins. But they agree that humans developed over many millions of years from early ancestors that were like apes.

2025年1月12日 · Life - Evolution, History, Earth: The evidence is overwhelming that all life on Earth has evolved from common ancestors in an unbroken chain since its origin. Darwin’s principle of evolution is summarized by the following facts.

2025年1月12日 · timeline of life on Earth Over hundreds of millions of years, life spread through the seas and over Earth's surface. The first life-forms were small and simple. Later forms were more complicated and diverse. (more)

These maps highlight notable milestones in human history from 3200 BCE to 1500 CE, a period that stretches from the development of stone tools in Australia to the building of the palace complex at Machu Picchu in South America.

The study of human origins is the study of how modern humans evolved from earlier humanlike species and other nonhuman primates that are now extinct. Since ancient times,…

Homo sapiens - Modern Populations, Migration, Adaptation: H. sapiens is now crammed into virtually every habitable region of Earth, yet it still bears the hallmarks of its origin as a tiny population inhabiting one small corner of the world.

The distinctive mark of Hominini, the lineage that includes humans and their direct ancestors, is generally taken to be upright land locomotion on two legs (terrestrial bipedalism).

Human evolution, the process by which human beings developed on Earth from now-extinct primates. The only extant members of the human tribe, Hominini, belong to the species Homo sapiens. The exact nature of the evolutionary relationships between modern humans and their ancestors remains the subject of debate.