If the Universe Is Teeming with Aliens ... Where Is by Stephen Webb

By Stephen Webb

Given the truth that there are probably four hundred billion stars in our Galaxy on my own, and maybe four hundred billion galaxies within the Universe, it stands to cause that someplace available in the market, within the 14-billion-year-old cosmos, there's or as soon as used to be a civilization at the very least as complicated as our personal. The sheer enormity of the numbers nearly calls for that we settle for the reality of this speculation. Why, then, have we encountered no facts, no messages, no artifacts of those extraterrestrials?

In this moment, considerably revised and accelerated version of his broadly well known ebook, Webb discusses intimately the (for now!) seventy five such a lot cogent and fascinating suggestions to Fermi's recognized paradox: If the numbers strongly aspect to the lifestyles of extraterrestrial civilizations, why have we chanced on no facts of them?

Show description

Read Online or Download If the Universe Is Teeming with Aliens ... Where Is Everybody?: Seventy-Five Solutions to the Fermi Paradox and the Problem of Extraterrestrial Life (2nd Edition) (Science and Fiction) PDF

Similar science books

SuperFuel: Thorium, The Green Energy Source for the Future

A riveting examine how an alternate resource of power is revoluntionising nuclear strength, promising a secure and fresh destiny for hundreds of thousands, and why thorium used to be sidelined on the peak of the chilly conflict

In this groundbreaking account of an power revolution within the making, award-winning technology author Richard Martin introduces us to thorium, a radioactive aspect and substitute nuclear gas that's a long way more secure, cleanser, and extra considerable than uranium.

At the sunrise of the Atomic Age, thorium and uranium appeared to be in shut festival because the gas of the long run. Uranium, with its skill to endure fission and bring explosive fabric for atomic guns, received out over its extra pacific sister point, relegating thorium to the dustbin of technological know-how.

Now, as we grapple with the perils of nuclear power and rogue atomic guns, and mankind confronts the threat of worldwide weather switch, thorium is re-emerging because the missed strength resource as a small crew of activists and outsiders is operating, with assistance from Silicon Valley traders, to construct a thorium-power undefined.

In the 1st booklet mainstream ebook to take on those concerns, Superfuel is a narrative of rediscovery of a protracted misplaced expertise that has the facility to rework the world's destiny, and the tale of the pacifists, who have been sidelined in favour of atomic weapon hawks, yet who can wean us off our fossil-fuel habit and sidestep the chance of nuclear meltdown for ever.

Transcendence: The Disinformation Encyclopedia of Transhumanism and the Singularity

Transhumanism is a world move that advocates using technology and expertise to beat the "natural" barriers skilled through humanity, via such advancements as:

the Singularity—the production of computer intelligences that exceed the capacities of our organic brains
the skill to duplicate person minds and placed them into solid-state our bodies or digital environments
individual regulate over psychological and emotional states for boosting functionalities and/or ecstasies
Some of this can be taking place now. a few it's nonetheless within the minds of dreamers.

In approximately 90 A-Z entries, Transcendence presents a multilayered examine the accelerating advances in man made intelligence, cognitive technological know-how, genomics, info know-how, nanotechnology, neuroscience, house exploration, artificial biology, robotics, and digital worlds which are making transhumanism a truth. Entries variety from Cloning and Cyborg Feminism to clothier infants and Memory-Editing medicinal drugs. furthermore, the publication notes historic predecessors and personalities, either in mythology and history—ranging from Timothy Leary to Michael Jackson to Ray Kurzweil. It additionally introduces the tradition round Transhumanism, protecting the entire geeky obsessions of the Transhumanist flow.

The Meaning of Science: An Introduction to the Philosophy of Science

Technology has produced factors for every thing from the mechanisms of insect navigation to the formation of black holes and the workings of black markets. yet how a lot will we belief technology, and will we really recognize the realm via it? How does technology paintings and the way does it fail? and the way can the paintings of scientists help—or hurt—everyday humans?

Progress in Ultrafast Intense Laser Science Volume I

This can be the 1st of a sequence of books on Ultrafast excessive Laser technology, a newly rising interdisciplinary examine box, spanning atomic and molecular physics, molecular technological know-how, and optical technology. Its growth is being motivated via the hot improvement of ultrafast laser applied sciences. Highlights of this quantity contain extreme VUV laser--cluster interplay, resonance and chaos-assisted tunneling, and the results of the carrier-envelope part on high-order harmonic iteration.

Additional resources for If the Universe Is Teeming with Aliens ... Where Is Everybody?: Seventy-Five Solutions to the Fermi Paradox and the Problem of Extraterrestrial Life (2nd Edition) (Science and Fiction)

Sample text

The original photograph of the meteor was by Olga Kruglova. (Credit: Sandia Labs) case—so even if the chance of finding something is exceedingly low there surely can be no harm in keeping an eye open for signs of past extraterrestrial visitations. If you don’t look, you can’t find. However, even if you think it likely that extraterrestrial industrialists visited Earth in the past (and personally I find it extremely improbable: I can’t imagine why intelligent creatures would travel light years just to pan for gold) finding evidence of the visit would require a huge dollop of luck.

For example, some radionuclides possess half lives measured in millions of years, so if extraterrestrial visitors dumped nuclear waste on the Cretaceous landscape it might leave a trace that we could detect today. ) If we found plutonium traces, for example, we would be forced to explain the find in terms of a technological civilization—either our own or an ETC: the half life of plutonium is such that there are no natural sources of the element. A second activity that might leave its mark over geological timescales would be large-scale quarrying: if the extraterrestrials came here to engage in the industrial mining of minerals then current geological surveys would in principle be able to detect the quarries (in the same way that meteor impact craters created millions of years ago are detectable, even if they are buried under further strata).

The monist in him impelled him to argue that if we expand into space then all those other species must do the same. The logic is inescapable, and 2 Of Fermi and Paradox 27 Tsiolkovsky was aware that this led to a paradox when maintaining both that mankind will expand into space and that the universe is brimful with intelligent life. In 1933, long before Fermi asked his question, Tsiolkovsky pointed out that people deny the existence of ETCs because (i) if such civilizations existed, then their representatives would have visited Earth, and (ii) if such civilizations existed, then they would have given us some sign of their existence.

Download PDF sample

Rated 4.79 of 5 – based on 14 votes

Author: admin