Origin and evolution of life

  • A new study provides a detailed picture of how opsins evolved. Opsins are light-sensitive molecules found in photoreceptor cells of the retina.
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  • Um novo estudo provém um retrato detalhado de como as opsinas evoluíram. Opsinas são moléculas sensíveis à luz encontradas em células fotorreceptoras da retina.
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  • A new study indicates that bacteria may have helped kick off the leap from single celled organisms to multicellular organisms.
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  • Researchers have discovered more evidence of preserved dinosaur proteins. Their findings support the case for preserved cells in ancient remains.
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  • A new concept is challenging one of the basic assumptions of the theory of evolution - that survival is based on a change's functional advantage if it is to persist.
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  • New research on a lizard-like amphibian highlights how difficult it would be for humans to regenerate a limb or organ.
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  • New research supports the idea that microorganisms embedded in the fragments of distant planets may have traveled to the early Earth and seeded our planet with life.
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  • Scientists have discovered an unusual symbiosis between tiny single-celled algae and highly specialized bacteria in the ocean.
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  • In order to understand how life began on Earth, researchers are creating concoctions of organics on ice and zapping them with lasers. The study provides the first look at organic chemistry on icy particles in the frigid reaches of our solar system.
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  • Sixty-five million years ago, a mass extinction on Earth wiped out the dinosaurs. New research now indicates that a separate extinction event occurred shortly before that, triggered by volcanic eruptions that warmed the planet.
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