How 'great' was the great oxygenation event?

Around 2.5 billion years ago, our planet experienced what was possibly the greatest change in its history: According to the geological record, molecular oxygen suddenly went from nonexistent to becoming freely available everywhere. ...

New study rebuts 75-year-old belief in reptile evolution

Challenging a 75-year-old notion about how and when reptiles evolved during the past 300 million-plus years involves a lot of camerawork, loads of CT scanning, and, most of all, thousands of miles of travel. Just check the ...

An evolutionary roll of the dice explains why we're not perfect

If evolution selects for the fittest organisms, why do we still have imperfections? Scientists at the Milner Centre for Evolution at the University of Bath investigating this question have found that in species with small ...

Biologists zero in on cells' environmental sensing mechanism

Evolutionary and developmental biologist Craig Albertson and colleagues at the University of Massachusetts Amherst report that they have identified a molecular mechanism that allows an organism to change the way it looks ...

Metabolic fossils from the origin of life

Life converts food into cells via dense networks involving thousands of reactions. New research uncovers insights as to how such networks could have arisen from scratch at life's origin. An international team of researchers ...

Understanding the genomic signature of coevolution

An international team of researchers including limnologists from the University of Konstanz shows that rapid genomic changes during antagonistic species interactions are shaped by the reciprocal effects of ecology and evolution.

Star formation in galactic centers

Stars form from the gas and dust in molecular clouds via a series of complex processes that are currently only partly understood, and the evolution of these clouds drives the evolution of the stellar populations in the universe. ...

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