background preloader

Abiogenesis

Abiogenesis
Scientific hypotheses about the origins of life can be divided into a number of categories. Many approaches investigate how self-replicating molecules or their components came into existence. On the assumption that life originated spontaneously on Earth, the Miller–Urey experiment and similar experiments demonstrated that most amino acids, often called "the building blocks of life", can be racemically synthesized in conditions which were intended to be similar to those of the early Earth. Several mechanisms have been investigated, including lightning and radiation. Other approaches ("metabolism first" hypotheses) focus on understanding how catalysis in chemical systems in the early Earth might have provided the precursor molecules necessary for self-replication. Early conditions[edit] The Hadean Earth is thought to have had a secondary atmosphere, formed through degassing of the rocks that accumulated from planetesimal impactors. The earliest life on Earth[edit] Current models[edit]

http://en.wikipedia.org/wiki/Abiogenesis

Related:  wikipediaLife

Kaspar Hauser Kaspar Hauser (30 April 1812 (?) – 17 December 1833) was a German youth who claimed to have grown up in the total isolation of a darkened cell. Hauser's claims, and his subsequent death by stabbing, sparked much debate and controversy. Timeline of evolutionary history of life Visual representation of the history of life on Earth as a spiral The dates given in this article are estimates based on scientific evidence. Basic timeline[edit] In its 4.6 billion years circling the sun, the Earth has harbored an increasing diversity of life forms:

How Incomprehensible Could Extraterrestrials Be? A few days ago Paul Gilster, the author of Centauri Dreams: Imagining and Planning Interstellar Exploration and the curator of Centauri Dreams , posted a thoughtful discussion of a blog entry I wrote (titled What's The Connection Between Deafness and SETI? ) His discussion and the resulting comments were fascinating, and in this post I want to carry on that conversation.

Russell's teapot Russell's teapot, sometimes called the celestial teapot or cosmic teapot, is an analogy first coined by the philosopher Bertrand Russell (1872–1970) to illustrate that the philosophic burden of proof lies upon a person making scientifically unfalsifiable claims rather than shifting the burden of proof to others, specifically in the case of religion. Russell wrote that if he claims that a teapot orbits the Sun somewhere in space between the Earth and Mars, it is nonsensical for him to expect others to believe him on the grounds that they cannot prove him wrong. Russell's teapot is still referred to in discussions concerning the existence of God.

10 Mind-Bending Implications of the Many Worlds Theory Our World In quantum physics—the scientific study of the nature of physical reality—there is plenty of room for interpretation within the realm of what is known. The most popular mainstream interpretation, the Copenhagen interpretation, has as one of its central tenets the concept of wave function collapse. That is to say, every event exists as a “wave function” which contains every possible outcome of that event, which “collapses”—distilling into the actual outcome, once it is observed. For example, if a room is unobserved, anything and everything that could possibly be in that room exists in “quantum superposition”—an indeterminate state, full of every possibility, at least until someone enters the room and observes it, thereby collapsing the wave function and solidifying the reality.

Uttar Pradesh Association of Dead People The Uttar Pradesh Association of Dead People (Uttar Pradesh Mritak Sangh) is a northern Indian pressure group that seeks to reclaim the legal rights of those falsely listed by the Indian government as being dead. In the overcrowded regions of Uttar Pradesh, many have resorted to bribing officials to have the owner of a plot declared deceased and the land transferred to their ownership. The process to undo this is long, arduous, as well as often hopelessly inefficient and corrupt — not to mention that those least able to fight back make excellent victims. The Association seeks to reverse the declarations, call attention to the problem and prevent others from being exploited in similar fashion.

Day One The meeting began with a brief introduction by John Dupré. The first speaker was Ford Doolittleof the Dept. of Biochemistry and Molecular Biology at Dalhousie University here in Halifax. His title was The Tree of Life, from three sides now. Ford introduced the topic from three perspectives: science, philosophy, and politics. The science is straightforward. You can construct perfectly respectable gene trees for bacteria using all kinds of different genes.

Life...As We Don't Know It This article originally appeared in ReaClearScience's Newton Blog. You can read the original here. It's amusing and intellectually stimulating to seriously ponder the existence and characteristics of alien life. But like quantum mechanics, such contemplations can easily wrack the mind, leaving one quite discombobulated. The Improbability of God The Improbability of God by Richard Dawkins from Free Inquiry, Volume 18, Number 3. Much of what people do is done in the name of God. Irishmen blow each other up in his name. Arabs blow themselves up in his name. Imams and ayatollahs oppress women in his name. Celibate popes and priests mess up people's sex lives in his name.

Stages of Conscious Awakening 25th January 2015 By Montalk Guest Writer for Wake Up World It is imperative that we awaken from mundane awareness into full spiritual remembrance of who we are. Doctor Sleep (novel) I mentioned two potential projects while I was on the road, one a new Mid-World book (not directly about Roland Deschain, but yes, he and his friend Cuthbert are in it, hunting a skin-man, which are what werewolves are called in that lost kingdom) and a sequel to The Shining called Doctor Sleep. Are you interested in reading either of these? If so, which one turns your dials more? [We] will be counting your votes (and of course it all means nothing if the muse doesn't speak).[7]

Related: