The timeline of the evolutionary history of life represents the current scientific theory outlining the major events during the development of life on planet Earth. Dates in this article are consensus estimates based on scientific evidence, mainly fossils.

For more than a billion years, the timeline of life on earth existed in primal forms. All life was single-celled organisms, made up mainly of bacteria and algae. When did life first evolve? It’s unknown why, but around 900 million years ago simple multi-celled organisms started to appear.

2009年7月14日 · Life Timeline: The evolution of life. The story of evolution spans over 3 billion years and shows how microscopic single-celled organisms transformed Earth and gave rise to complex...

A Timeline of the Eons’s, Era’s, & Periods. The development of life over the last 3,700 million years of the Earth's history is one of the great stories told by modern science. During most of this time living things left only traces to indicate their existence.

This timeline of the evolutionary history of life represents the current scientific theory outlining the major events during the development of life on plan et Earth . In biology , evolution is any change across successive generations in the heritable characteristics of biological populations. Evolutionary processes give rise to dive rsity at ...

2024年12月24日 · Fossil evidence has charted evolutionary milestones over the past half-billion years, but researchers have now pushed this timeline even further back. The study, led by Virginia Tech geobiologist Shuhai Xiao, expands our understanding of ancient life to the Proterozoic Eon, which spans 2,500 million to 539 million years ago.

The history of life on Earth traces the processes by which living and extinct organisms evolved, from the earliest emergence of life to the present day.

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.

For the history of evolutionary biology, see History of evolutionary thought. This timeline of the evolution of life outlines the major events in the development of life on the planet Earth. For a thorough explanatory context, see the history of Earth, and geologic time scale.

Explore the timeline below to view some of the major events in life’s history. Anatomically modern humans evolve. Seventy thousand years later, their descendents create cave paintings — early expressions of consciousness. In Africa, an early hominid, affectionately named “Lucy” by …