[A planet and a destiny].

Rev Enferm

Published: December 2003

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Recent years have seen increasingly severe natural disasters, the consequences of which have been catastrophic. Clearly, our global environment is undergoing major changes. The climate is becoming deranged and pollution on a global scale afflicts air, water, and land.

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Imagining a habitable planet through food and health.

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Monash Asia Institute, Monash University, Melbourne, VIC, Australia.

Background And Objectives: Whether and how it might be possible to imagine a habitable planet through food and health.

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Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA.

Research into understanding the origins-and evolution-of life has long been dominated by the concept of taking clues from extant biology and extrapolating its molecules and pathways backwards in time. This approach has also guided the search for solutions to the problem of how contemporary biomolecules would have arisen directly from prebiotic chemistry on early earth. However, the continuing difficulties in finding universally convincing solutions in connecting prebiotic chemistry to biological chemistry should give us pause, and prompt us to rethink this concept of treating extant life's chemical processes as the sole end goal and, therefore, focusing only, and implicitly, on the respective extant chemical building blocks.

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Scenarios of giant planet formation and evolution and their impact on the formation of habitable terrestrial planets.

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Laboratoire Lagrange, CNRS, Observatoire de la Côte d'Azur, Université de Nice - Sophia Antipolis, , BP 4229, 06304 Nice Cedex 4, France.

In our Solar System, there is a clear divide between the terrestrial and giant planets. These two categories of planets formed and evolved separately, almost in isolation from each other. This was possible because Jupiter avoided migrating into the inner Solar System, most probably due to the presence of Saturn, and never acquired a large-eccentricity orbit, even during the phase of orbital instability that the giant planets most likely experienced.

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