Documenting the Coming Singularity

Showing posts with label extraterrestrial intelligence. Show all posts
Showing posts with label extraterrestrial intelligence. Show all posts

Monday, January 29, 2018

10 Unsettling Solutions to the Fermi Paradox (Video)

You know about the Fermi Paradox, right? No? It's pretty simple, really. It boils down to the question, Where are all the aliens? It's about the apparent contradiction between estimates of how many aliens should be out there (lots!) and how many we've met (none so far!).

Check out this video that lists 10 possible solutions to the paradox. Enjoy!



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Sunday, October 20, 2013

Are We Looking Right at E.T. Without Seeing It?

Huffington Post - 10.17.13 by Cadell Last

In essence Vidal is claiming that these systems are not typical binary stars, but rather civilizations that have advanced well passed a Type 1 civilization on the Kardashev scale and are now actively feeding on their parent star.
Philosophy and the physical sciences have a long and interesting past spanning the entirety of human history. Philosophers have played the role of logically deducing the existence of certain physical phenomena that were untestable. Physical scientists have then either empirically confirmed or refuted the philosophical speculation proposed when the necessary technology and/or method were developed.

Sometimes the philosophical speculations failed to describe the nature of reality, like the Ancient Greek proposition that the heavens were composed of a fifth element: aether . However, on several occasions, the philosophical speculations turned out to be quite exact. For example, in the 4th century B.C.E. philosopher Democritus deduced that the universe was composed of indivisible units of matter known as "atoms." This belief was substantiated over 2,000 years later by the theoretical physicist Albert Einstein (you may have heard of him).

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Saturday, September 14, 2013

The Search for (Dead) Extraterrestrial Intelligence

aeon - By Paul Glister

If we can so easily misinterpret our own past, how might we misconstrue the artefacts of a truly alien culture?
W. M. Keck Observatory, Hawaii
‘Look on my works, ye Mighty, and despair!’ says Ozymandias’s ruined statue in the desert of Shelley’s imagination. Shelley’s sonnet is often interpreted as a sober warning that human works are fleeting, but when I read it as a young boy it kindled a sense of adventure; it suggested a wonderfully mysterious past beneath my familiar suburban surroundings. As a child, I was obsessed with archaeology, the attempt to understand the past through enigmatic remains. I spent many afternoons digging up dark patches of Midwestern soil, as I searched the region’s dense forests for artefacts of the Mississippian Indian cultures. I never found a lost city, but I occasionally turned up an arrowhead that would set me speculating about its owner and how it was lost. Through archaeology, I came to see landscapes as temporary surfaces that concealed a deep history. The world became rich with hidden texts.

Boyhood obsessions often linger into adulthood, even if they aren’t immediately recognisable. These days I find myself looking up into the Milky Way’s majestic thread, wondering if its stars play host to monuments as haunting as those found in Egypt’s Valley of the Kings. The natural sciences tell us that time is deep, and that civilisations could have arisen well before the Earth formed. Today, a small group of interstellar archaeologists is looking for evidence of those civilisations. They are tantalised by the possibility that the universe is not just a birthplace of alien cultures but also their necropolis.

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Sunday, July 21, 2013

Where Are All The Alien Self-Replicating Robotic Space Probes?

The Daily Galaxy - 7.20.13

"Likewise, the surface of the moon and portions of Mars have been searched at a sufficient resolution to have uncovered any non-terrestrial artifacts that could have been present. However, the deep oceans of Earth and the subsurface of the Moon are largely unexplored territory, while regions such as the asteroid belt, the Kuiper belt, and stable orbits around other Solar System planets could also contain non-terrestrial artifacts that have so far escaped human observation."
Researchers from Edinburgh University have said 'self replicating' robotic space probes from alien civilisations could already have arrived in our solar system according to mathematicians Duncan Forgan and Arwen Nicholson referred to in their paper 'Slingshot Dynamics for Self Replicating Probes and the Effect on Exploration Timescales', could be so hi-tech that they're invisible to human beings, the researchers said. According to the researchers' calculations alien probes would only need to travel at one tenth of the speed of light in order to explore every part of our galaxy within 10 million years.

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Sunday, May 26, 2013

Search for Extraterrestrial Tech

Universe Today - 5.24.13 by Markus Hammonds

Dyson put forward the ideas that any potentially advanced civilisation may need a tremendous amount of power to sustain itself. A method he proposed was to build a vast array of satellites which would enclose an entire star to harvest its energy.
Credit: Hill/Wikimedia Commons
It’s a big galaxy out there. Even the most skeptical scientist has to accept that if a civilisation like our own exists, then there’s a good chance we’re not the only one to have ever done so. When most people think about SETI (the search for extraterrestrial intellgence), they imagine someone like Ellie Arroway searching the skies for radio transmissions. But what about looking in other ways? Perhaps a highly advanced alien civilisation might build structures large enough for us to see.

Vast structures, constructed on astronomical scales by advanced civilisations, is what the field of astroengineering is all about. This, admittedly, sounds audacious – and for the human race right now, it is. For us, astroengineering is still very much the realm of thought experiments, theoretical calculations, and science fiction. So it may be surprising to know that certain astronomers have made some quite serious attempts to look for astroengineered artifacts around other stars. With telescopes becoming ever more sensitive, and images being taken of exoplanets, the idea is starting to captivate imaginations once more.

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Monday, August 01, 2011

Are we alone in the universe?

Cornell University Library - July 19, 2011

Life arose on Earth sometime in the first few hundred million years after the young planet had cooled to the point that it could support water-based organisms on its surface. The early emergence of life on Earth has been taken as evidence that the probability of abiogenesis is high, if starting from young-Earth-like conditions. We revisit this argument quantitatively in a Bayesian statistical framework. By constructing a simple model of the probability of abiogenesis, we calculate a Bayesian estimate of its posterior probability, given the data that life emerged fairly early in Earth's history and that, billions of years later, sentient creatures noted this fact and considered its implications. We find that, given only this very limited empirical information, the choice of Bayesian prior for the abiogenesis probability parameter has a dominant influence on the computed posterior probability. Thus, although life began on this planet fairly soon after the Earth became habitable, this fact is consistent with an arbitrarily low intrinsic probability of abiogenesis for plausible uninformative priors, and therefore with life being arbitrarily rare in the Universe.

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Monday, September 06, 2010

Dr. Michio Kaku interviewed about UFOs (Video)

According to my favorite TV scientist, Dr. Michio Kaku, although most (95%) reported sightings of UFOs can be explained as natural phenomena or known aircraft, there's a troubling 5% that defies explanation. He also talks about what they might be. Interesting.



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Monday, August 23, 2010

Looking for ET in all the wrong places

We've all heard of SETI, the Search for Extraterrestrial Intelligence. We're talking here about a search that utilizes the scientific method and that began, in a sense, with the discovery of radio. As far back as 1896 Nikola Tesla spoke about the possibility of using radio to make contact with intelligent life on other worlds.

This article by Jason Palmer, writing for BBC News, highlights the suggestion by an experienced astronomer that we may have been looking in the wrong places, for the wrong kind of intelligent life.

Writing in Acta Astronautica, he says that the odds favour detecting such alien AI rather than "biological" life.

Many involved in Seti have long argued that nature may have solved the problem of life using different designs or chemicals, suggesting extraterrestrials would not only not look like us, but that they would not at a biological level even work like us.

However, Seti searchers have mostly still worked under the assumption - as a starting point for a search of the entire cosmos - that ETs would be "alive" in the sense that we know.

That has led to a hunt for life that is bound to follow at least some rules of biochemistry, live for a finite period of time, procreate, and above all be subject to the processes of evolution.

But Dr Shostak makes the point that while evolution can take a large amount of time to develop beings capable of communicating beyond their own planet, technology would already be advancing fast enough to eclipse the species that wrought it.

"If you look at the timescales for the development of technology, at some point you invent radio and then you go on the air and then we have a chance of finding you," he told BBC News.

"But within a few hundred years of inventing radio - at least if we're any example - you invent thinking machines; we're probably going to do that in this century.

"So you've invented your successors and only for a few hundred years are you... a 'biological' intelligence."

From a probability point of view, if such thinking machines ever evolved, we would be more likely to spot signals from them than from the "biological" life that invented them.


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Thursday, June 24, 2010

Where are all the ETs? Nick Bostrom discusses (Video)



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Friday, February 19, 2010

Taking the search for extraterrestrials off-world

NewScientist - 2.18.10

Boosting signals from ET (Image: TED/James Duncan Davidson).

FRANK DRAKE, the founder of the Search for Extraterrestrial Intelligence (SETI), wants to take the search for aliens further: about 82 billion kilometres away, in fact.

At this point in space, electromagnetic signals from planets orbiting distant stars would be focused by the gravitational lensing effect of our sun, making them, in theory, more easily detected. Drake wants to send spacecraft there in a bid to overhear alien communications, which would be too faint for telescopes on Earth to detect.

It's neither a new or original idea, but it has never taken off because of the distances involved. With existing propulsion technologies, spacecraft would take hundreds of years to make the voyage, which is about 550 times the distance from Earth to the sun.

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