Origin and evolution of life

  • The Three Domains of Life
    When scientists first started to classify life, everything was designated as either an animal or a plant. But as new forms of life were discovered, the original classification was not sufficient enough to organize the diversity and complexity of life.
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  • Test-tube RNA
    Research done by scientists at the Whitehead Institute for Biomedical Research offers insights into evolutionary origins of life.
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  • The Oldest Life on Land
    Fossilized remnants of a microbial mat provide evidence that life existed on land as early as 2.6 to 2.7 billion years ago. The findings suggest that an oxygen atmosphere and a protective ozone layer were in place around Earth by that time.
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  • Genetic Alchemy: Turning Lobsters into Fruit Flies
    Biologists at the University of California, San Diego, now have genetic evidence that explains how such drastic alterations to body plans were able to occur during the early evolution of animals.
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  • Clues to the Last Common Ancestor
    Molecular detectives have traced human ancestry back to the so-called Mitochondrial Eve, the last female common ancestor. More recent research has posited a Y-chromosome Adam, the last male common ancestor.
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  • Uranus and Neptune – and the Origin of Life on Earth
    Constraints on the giant planets and birth aggregates of the solar system.
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  • Clues to the Last Common Ancestor
    Molecular detectives have traced human ancestry back to the so-called Mitochondrial Eve, the last female common ancestor. More recent research has posited a Y-chromosome Adam, the last male common ancestor.
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  • Genetic Alchemy: Turning Lobsters into Fruit Flies
    Biologists at the University of California, San Diego, now have genetic evidence that explains how such drastic alterations to body plans were able to occur during the early evolution of animals.
    more...
  • Quando os cientistas começaram a classificar a vida, tudo foi designado como animal ou planta. Mas enquanto novas formas de vida eram descobertas, a classificação original não foi suficiente para organizar a diversidade e complexidade da vida.
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  • One-Handed Life
    Scientists with the NASA Astrobiology Institute have created self-replicating molecules that produce only "left-handed molecules or only "right-handed molecules.The findings may help explain why life is based on left-handed amino acids.
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