Mystery Fossil Challenges What We Know About Early Land Life, A Major Rewrite for Evolutionary History ...

Life on Earth may have learned to breathe oxygen long before oxygen filled the skies. MIT researchers traced a key ...

Learn more about the top theories about how life began on Earth, and how it may not have started from scratch.

Scientists think they’ve found a way to investigate the creation of cell membranes and DNA genomes that gave rise to the last ...

Ancient enzymes show life’s nitrogen signal stayed unchanged for billions of years, helping scientists read early Earth.

Titan, Saturn’s largest moon, possesses a thick, nitrogen-rich atmosphere that bears striking similarities to that of early Earth. Scientists are fascinated by Titan’s atmospheric composition and its ...

Life’s story may stretch further back than scientists once thought. Some genes found in nearly every organism today were already duplicated before all life shared a common ancestor. By tracking these ...

Introduction : The coherence of history / Stephen Jay Gould -- The planetary setting of prebiotic evolution / Sherwood Chang -- Early environments : constraints and opportunities for early evolution / ...

Scientists have many theories about how Earth's raw materials turned into living cells, but a new proposal is particularly ...

How did life begin on Earth? While scientists have theories, they don't yet fully understand the precise chemical steps that led to biology, or when the first primitive life forms appeared. But what ...