The biggest planets hogged a lot of the raw materials and were fully formed first.
Articles on Ancient Earth
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How did Australia end up with so much iron ore? What we discovered in Western Australia redefines how we think about iron deposits – and provides clues on how we might find more.
Fossil evidence of how the earliest life on Earth came to be is hard to come by. But scientists have come up with a few theories based on the microbes, viruses and prions existing today.
Looking a bit like enlarged woodlice, ancient trilobites crawled along the seabed and had an exoskeleton made of calcite — nature’s version of a suit of armour.
In what could be described as a rather difficult adolescence, Earth earliest continents remained in flux — disappearing and reappeared over 1.5 billion years before finally gaining form.
Top contributors
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Post-doctoral researcher in Palaeobiology, Flinders University
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Professor of Earth Sciences, University of New England
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Postdoctoral Research Associate in Geological Sciences, University of Colorado Boulder
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Postdoctoral researcher, Uppsala University
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Lecturer in Geophysics, Monash University
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Professor and ARC Laureate Fellow, Monash University
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Professor Emeritus of Microbiology, University of Connecticut
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Associate Professor, Monash University
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Teaching Professor of Astronomy & Astrophysics, Penn State
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Ph.D. Student in Astronomy & Astrophysics, Penn State