• úvod
  • témata
  • události
  • tržiště
  • diskuze
  • nástěnka
  • přihlásit
    registrace
    ztracené heslo?
    TADEASplanetarita - 'making life planetary'
    TADEAS
    TADEAS --- ---
    ‘We better watch out’: NASA boss sounds alarm on Chinese moon ambitions - POLITICO
    https://www.politico.com/news/2023/01/01/we-better-watch-out-nasa-boss-sounds-alarm-on-chinese-moon-ambitions-00075803
    TADEAS
    TADEAS --- ---
    Betül Kaçar: Origin of Life, Ancient DNA, Panspermia, and Aliens | Lex Fridman Podcast #350
    https://youtu.be/NXU_M4030nE
    TUHO
    TUHO --- ---
    VLADIMIR VERNADSKY AND THE CO-EVOLUTION OF THE BIOSPHERE, THE NOOSPHERE, AND THE TECHNOSPHERE

    Was Vernadsky a precursor to the post-Second World War Holocene-Anthropocene transition? Probably not. It is true that he had already prefigured ethical issues deriving from the ecological imbalances of man’s engagement with nature in a time when ecological concerns were banished under the Stalinist regime; but Vernadsky was thus censored, deformed, or ignored until very recently. However, if on the one hand he believed that changes and accelerations in the human technical system of labor and production can cause geological phenomena of huge significance, on the other his noosphere notion seems to coincide with the fulfillment of a new morality, a new rationality, and eventually the emergence of a new humanism. This does not resemble the catastrophic tone of Crutzen’s Geology of Mankind or, more in general, the idea of the Anthropocene that constantly reminds us about the damaging effects that humankind has had on the environment since at least the thermo-industrial revolution of the mid-nineteenth and twentieth centuries. Indeed, Vernadsky’s latest writings on the noosphere seem instead more optimistic with regard to humanity’s future use of scientific and technological knowledge.

    https://www.anthropocene-curriculum.org/contribution/vladimir-vernadsky-and-the-co-evolution-of-the-biosphere-the-noosphere-and-the-technosphere
    TUHO
    TUHO --- ---
    TUHO
    TUHO --- ---
    TUHO: .]

    Ussher deduced that the first day of creation was October 23, 4004 BC
    TUHO
    TUHO --- ---
    TUHO: versus Usher chronology

    The Ussher chronology is a 17th-century chronology of the history of the world formulated from a literal reading of the Old Testament by James Ussher, the Archbishop of Armagh and Primate of All Ireland. The chronology is sometimes associated with young Earth creationism, which holds that the universe was created only a few millennia ago by God as described in the first two chapters of the biblical book of Genesis. Ussher's work fell into disrepute in the 19th century.

    Ussher chronology - Wikipedia
    https://en.wikipedia.org/wiki/Ussher_chronology
    TUHO
    TUHO --- ---
    vynalez geologickeho casu

    Sci-Hub | The age of the Earth and the invention of geological time. Geological Society, London, Special Publications, 143(1), 137–143 | 10.1144/gsl.sp.1998.143.01.12
    https://sci-hub.se/10.1144/gsl.sp.1998.143.01.12

    TUHO
    TUHO --- ---
    TUHO: In 1795, Hutton developed and used his uniformitarian principle, that the geological processes at work now are key to understanding past geological activity. No more starting history of the world with the Biblical Genesis (though he did not say so). Hutton was perhaps first to think in terms of an earth system (1795:II, 540): “The system of this earth appears to comprehend many different operations; and it exhibits various powers co-operating for the production of those effects which we perceive.” He began his argument with a fact he stated was widely known: Land was formerly under water. The system which he built upon this fact was that the earth undergoes constant change. The final 27-page chapter of Volume 2 summarized the arguments in his treatise. He finally asked what forces could effect these changes, and on that, he had no answer.
    TUHO
    TUHO --- ---
    Humanity has become a dominant force in shaping the face of Earth1,2,3,4,5,6,7,8,9. An emerging question is how the overall material output of human activities compares to the overall natural biomass. Here we quantify the human-made mass, referred to as ‘anthropogenic mass’, and compare it to the overall living biomass on Earth, which currently equals approximately 1.1 teratonnes10,11. We find that Earth is exactly at the crossover point; in the year 2020 (± 6), the anthropogenic mass, which has recently doubled roughly every 20 years, will surpass all global living biomass. On average, for each person on the globe, anthropogenic mass equal to more than his or her bodyweight is produced every week. This quantification of the human enterprise gives a mass-based quantitative and symbolic characterization of the human-induced epoch of the Anthropocene.

    Global human-made mass exceeds all living biomass | Nature
    https://www.nature.com/articles/s41586-020-3010-5
    TUHO
    TUHO --- ---
    Origins of biogeochemistry

    Biogeochemistry: its origins and development | SpringerLink
    https://link.springer.com/article/10.1007/BF00002942
    TUHO
    TUHO --- ---
    History of Ecological Sciences, Part 63: Biosphere Ecology
    https://esajournals.onlinelibrary.wiley.com/doi/10.1002/bes2.1568
    TADEAS
    TADEAS --- ---
    If aliens contact humanity, who decides what we do next? | Space | The Guardian
    https://www.theguardian.com/science/2022/dec/29/if-aliens-contact-humanity-who-decides-what-we-do-next
    TUHO
    TUHO --- ---
    TUHO: In ecological economics, human economy is not a closed loop—it is a transitory assemblage of matter and energy; a metabolic flux, an unstable moment of larger geophysical and biochemical drama.[8] This metabolic perspective is championed also by early founders of ecological economics, especially Nicolas Georgescu-Roegen. His account suggests that economy is an evolving apparatus functioning as a thermodynamic differential—it sucks low entropy and spits out high entropy, while ideally keeping its internal entropy on a stable level, much like organisms do.[9] What is crucial here is the overall “carrying capacity”[10] of the environment that hosts the economic assemblage—if the assemblage produces too much high entropy, it undermines environmental conditions allowing for future existence of this very assemblage. Here, the figure of the limit gets reinscribed in its dynamic version. If we are to follow this metabolic metaphor further, we might even say that just as organisms, economic assemblages obey what Sanford Kwinter—while discussing Jakob von Uëxkull’s idea of Umwelt—labelled as principle of immanentism, which states that “the distinction between organism and environment, inside and out, is but one of degree: a greater or lesser compression or dilation of information”.[11]
    TUHO
    TUHO --- ---
    A nejaky uvody do ekologicke ekonomike

    The Development of Environmental Thinking in Economics
    https://www.jstor.org/stable/30302282

    The early history of modern ecological economics
    https://www.sciencedirect.com/science/article/abs/pii/S0921800904002058
    TUHO
    TUHO --- ---
    A neco k diverzite

    Measuring commonness and rarity is pivotal to ecology and conservation. Zeta diversity, the average number of species shared by multiple sets of assemblages, and Dark diversity, the number of species that could occur in an assemblage but are missing, have been recently proposed to capture two aspects of the commonness-rarity spectrum. Despite a shared focus on commonness and rarity, thus far, Zeta and Dark diversities have been assessed separately. Here, we review these two frameworks and suggest their integration into a unified paradigm of the “rarity facets of biodiversity.” This can be achieved by partitioning Alpha and Beta diversities into five components (the Zeta, Eta, Theta, Iota, and Kappa rarity facets) defined based on the commonness and rarity of species. Each facet is assessed in traditional and multiassemblage fashions to bridge conceptual differences between Dark diversity and Zeta diversity. We discuss applications of the rarity facets including comparing the taxonomic, functional, and phylogenetic diversity of rare and common species, or measuring species' prevalence in different facets as a metric of species rarity. The rarity facets integrate two emergent paradigms in biodiversity science to better understand the ecology of commonness and rarity, an important endeavor in a time of widespread changes in biodiversity across the Earth.

    https://onlinelibrary.wiley.com/doi/full/10.1002/ece3.8096
    TUHO
    TUHO --- ---
    TUHO
    TUHO --- ---
    Planet, Zone, Grid: A contemporary view on infrastructures
    https://www.youtube.com/watch?v=zeqvc-rbtXQ
    TUHO
    TUHO --- ---
    If life on Earth started out in geochemical environments like hydrothermal vents, then it started out from gasses like CO2, N2 and H2. Anaerobic autotrophs still live from these gasses today, and they still inhabit the Earth's crust. In the search for connections between abiotic processes in ancient geological systems and biotic processes in biological systems, it becomes evident that chemical activation (catalysis) of these gasses and a constant source of energy are key. The H2–CO2 redox reaction provides a constant source of energy and anabolic inputs, because the equilibrium lies on the side of reduced carbon compounds. Identifying geochemical catalysts that activate these gasses en route to nitrogenous organic compounds and small autocatalytic networks will be an important step towards understanding prebiotic chemistry that operates only on the basis of chemical energy, without input from solar radiation. So, if life arose in the dark depths of hydrothermal vents, then understanding reactions and catalysts that operate under such conditions is crucial for understanding origins.


    https://royalsocietypublishing.org/doi/10.1098/rsfs.2019.0072
    TADEAS
    TADEAS --- ---
    Why is Science Important?. Yesterday, I had a Q&A session with… | by Avi Loeb | Dec, 2022 | Medium
    https://avi-loeb.medium.com/why-is-science-important-416fc081a8ed

    The challenges of adapting to new environments in space would be vast, far greater than the challenge of leaving the jungles of Africa to inhabit tech-rich cities — which our predecessors accomplished in the span of the last hundred thousand years. Survival of the fittest in interstellar space requires the tools of advanced science and technology.

    For long-term survival, we must figure out how to repair and augment the human body so that our future astronauts will have a lifetime of millions of years in interstellar space. This would lead to an exponential growth in the population of interstellar spacecraft. The doubling time could be as short as 100,000 years, the travel time of our existing chemical rockets to the habitable planets around the nearest star to the Sun, Proxima Centauri. Over merely 5 million years, the lifespan of the human species so far, interstellar astronauts could go through 40 doublings. Starting with a single craft might yield 2 to the power of 40 spacecraft in 5 million years. This amounts to a trillion spacecraft which could target all the habitable planets in the Milky Way galaxy.

    Sharing our scientific knowledge with all intelligent beings in interstellar space could be a natural extension of our international scientific endeavor on Earth. Expanding the scientific program from international to interstellar also offers a grander benefit from reciprocity. One of our destinations might include a civilization which made scientific discoveries that exceed our knowledge. In that case, we could learn from them.

    Here’s hoping that the friction that interstellar explorers will encounter with nay-sayers or bureaucrats who want them to focus all resources on their home planet, might be overcome by the fruits of interstellar wisdom. Ad Astra!
    R_U_SIRIOUS
    R_U_SIRIOUS --- ---
    Nevím přesně, kam s tím?

    Emissions Map - Climate TRACE
    https://climatetrace.org/map


    Interaktivní mapa ukazuje znečišťovatele životního prostředí. V Česku vedou cementárny a ocelárny – Živě.cz
    https://www.zive.cz/clanky/interaktivni-mapa-ukazuje-znecistovatele-zivotniho-prostredi-v-cesku-vedou-cementarny-a-ocelarny/sc-3-a-219897/default.aspx
    Kliknutím sem můžete změnit nastavení reklam