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Timeline of the evolutionary history of life - Wikipedia, the free ...


This timeline of evolution of life represents the current scientific theory outlining the major events during the development of life on planet Earth. ... The first known mass extinction in earth'...

BBC Nature - History of life on Earth


The history of life on Earth began about 3.8 billion years ago, initially with single- celled prokaryotic cells, such ... 570 million years ago, First arthropods evolve.

Scientists may have found the earliest evidence of life on Earth ...


Oct 19, 2015 ... Now, a controversial new study presents potential evidence that life ... These crystals provide a rare glimpse into the first chapter of Earth's ...

How Did Life Arise on Earth? - Live Science


Sep 1, 2016 ... Indeed, some scientists think life appeared the moment our planet's ... But despite knowing approximately when life first appeared on Earth, ...

7 Theories on the Origin of Life - Live Science


Mar 24, 2016 ... From lightning to space rocks, here are ideas for how the first life on Earth came to be.

The Beginnings of Life - The Physics of the Universe


The study of the origin of life on Earth or, more specifically, how life on Earth ... is the study of how living things have changed over time since life first arose).

Earth's Beginnings: The Origins of Life | Ecology Global Network


Sep 10, 2011 ... For nearly the first billion years of formation (4.5 to 3.8 billion years ago) ..... Life as we 'know it' formed – first Earth out of the same gases and ...

How Did Life Start On Earth?


Scientists do not know how life began on Earth. ... carbon dioxide in the presence of a catalyst into small organic molecules - was how the first life developed.

Timeline: The evolution of life | New Scientist


Jul 14, 2009 ... There are all sorts of ways to reconstruct the history of life on Earth. ... The first life may have developed in undersea alkaline vents, and was ...

Exploring Life's Origins: A Timeline of Life's Evolution


This suggests that life must have evolved sometime during Earth's tumultuous first billion years. How did life evolve? And what did early forms of life look like?

The first life on Earth was most likely simple, single-celled organisms that shared characteristics with organisms currently in the domain Archaea.