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Gaia hypothesis, levels od selection. Are viruses alive?

, - some thoughts and musings on Gaia

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Gaia hypothesis | Define Gaia hypothesis at …

Our present exoplanet hunters such as the ESA's Gaia mission, to be launched in 2013, will use photometry (slight dimming of the star during planetary transits) to seek exoplanets within 200 parsecs (670 light years) of Earth, more than twice the critical distance of the SKA.

  - very good review of the Gaia hypothesis from the holistic perspective

What should we have thought of an early race of hunters who developed a taste for horsemeat and then proceeded to eliminate the horse from the Earth by systematically hunting and killing every one, merely to satisfy their appetite? Savage, lazy, stupid, selfish, and cruel are some of the epithets that come to mind; and what a waste to fail to recognise the possibility of the working partnership between horse and man! It is bad enough to cull or farm the whale so as to provide a constant supply of those products which whale-hunting nations claim are needed by their backward and primitive industries. If we hunt them heedlessly to extinction it must surely be a form of genocide, and will be an indictment of the indolent and hidebound national bureaucracies, Marxist and capitalist alike, which have neither the heart to feel nor the sense to comprehend the magnitude of the crime. Yet perhaps it is not too late for them to see the error of their ways. Perhaps one day the children we shall share with Gaia will peacefully co-operate with the great mammals of the ocean and use whale power to travel faster and faster in the mind, as horse power once carried us over the ground.

The Gaia hypothesis - definition of The Gaia hypothesis …

Atmospheric homeostasis by and for the biosphere – The Gaia hypothesis.

Lovelock argues that humans have now pushed Gaia to her limit. In addition to filling the atmosphere with carbon dioxide, we have hacked our way through the "lungs" of the planet (the rainforests) and driven many species to extinction. He thinks we are heading for a very warm world, where only polar regions are comfortable for most life forms. Eventually, he suspects, Gaia will pull things back into check, but it may be too late for the human race.

Over the past 200 years mankind has greatly increased atmospheric carbon dioxide levels, and recently there has been evidence that algal blooms in the ocean are increasing. Could Gaia be trying to correct our mistake?

The Gaia hypothesis synonyms, The Gaia hypothesis pronunciation, ..

Define gaia hypothesis - Leipzig Reisemobilhafen

I first put forward the Gaia hypothesis at a scientific meeting about the origins of life on Earth which took place in Princeton, New Jersey, in 1969. Perhaps it was poorly presented. It certainly did not appeal to anyone except Lars Gunnar Sillen, the Swedish chemist now sadly dead, and Lynn Margulis, of Boston University, who had the task of editing our various contributions. A year later in Boston Lynn and I met again and began a most rewarding collaboration which, with her deep knowledge and insight as a life scientist, was to go far in adding substance to the wraith of Gaia, and which still happily continues.

We have since defined Gaia as a complex entity involving the Earth's biosphere, atmosphere, oceans, and soil; the totality constituting a feedback or cybernetic system which seeks an optimal physical and chemical environment for life on this planet. The maintenance of relatively constant conditions by active control may be conveniently described by the term 'homoeostasis'.

Gaia | Definition of Gaia by Merriam-Webster
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  • My verdict on Gaia hypothesis: beautiful but flawed

    Gaia hypothesis - Wikipedia

  • Definition of gaia hypothesis - …

    The Gaia hypothesis (/ ˈ ɡ aɪ

  • This is the crux of the Gaia hypothesis..

    What is Gaia hypothesis

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Atmospheric homeostasis by and for the biosphere: the Gaia hypothesis

If Gaia exists, the relationship between her and man, a dominant animal species in the complex living system, and the possibly shifting balance of power between them, are questions of obvious importance. I have discussed them in later chapters, but this book is written primarily to stimulate and entertain. The Gaia hypothesis is for those who like to walk or simply stand and stare, to wonder about the Earth and the life it bears, and to speculate about the consequences of our own presence here. It is an alternative to that pessimistic view which sees nature as a primitive force to be subdued and conquered. It is also an alternative to that equally depressing picture of our planet as a demented spaceship, forever travelling, driverless and purposeless, around an inner circle of the sun.

James Lovelock and the Gaia hypothesis ..

This chapter begins autobiographically so that I may bring us the more easily to consider the most speculative and intangible aspects of the Gaia hypothesis: those which concern thought and emotion in the interrelationship of man and Gaia.

The Gaia Hypothesis by Michael Ruse gets to the heart of the question

Gaia has remained a hypothesis but, like other useful hypotheses, she has already proved her theoretical value, if not her existence, by giving rise to experimental questions and answers which were profitable exercises in themselves. If, for example, the atmosphere is, among other things, a device for conveying raw materials to and from the biosphere, it would be reasonable to assume the presence of carrier compounds for elements essential in all biological systems, for example, iodine and sulphur. It was rewarding to find evidence that both were conveyed from the oceans, where they are abundant, through the air to the land surface, where they are in short supply. The carrier compounds, methyl iodide and dimethyl sulphide respectively, are directly produced by marine life. Scientific curiosity being unquenchable, the presence of these interesting compounds in the atmosphere would no doubt have been discovered in the end and their importance discussed without the stimulus of the Gaia hypothesis. But they were actively sought as a result of the hypothesis and their presence was consistent with it.

Review: The Vanishing Face of Gaia …

Let us start by considering our sense of beauty. By this, I mean those complex feelings of pleasure, recognition, and fulfilment, of wonder, excitement, and yearning, which fill us when we see, feel, smell, or hear whatever heightens our self-awareness and at the same time deepens our perception of the true nature of things. It has often been said-and for some, ad nauseam-that these pleasurable sensations are inextricably bound up with that strange hyperaesthesia of romantic love. Even so, there seems no need inevitably to attribute the pleasure we feel on a country walk, as our gaze wanders over the downs, to our instinctive comparison of the smooth rounded hills with the contours of a woman's breasts. The thought may indeed occur to us, but we could also explain our pleasure in Gaian terms.

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