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TagExtraterrestrials (ET)

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Demonic eyes

Ancient Philosopher: There Might Be Life Forms Not Bound to Earth

Surprisingly, a philosopher may have thought of it first over 2500 years ago

Wade Roush, author of Extraterrestrials, discusses the views of Anaximander (c. 610—546 B.C.E.) Anaximander, a philosopher who lived in Miletus in modern-day Turkey, contributed one key idea. He was the first to propose that Earth is a body floating in an infinite void, held up by nothing. For someone who lived 2,200 years before Isaac Newton, this was a stunning insight. The philosopher Karl Popper called it “one of the boldest, most revolutionary, and most portentous ideas in the whole history of human thought.” Anaximander also thought Earth was a cylinder with the continents arrayed on one flat end, so he wasn’t right about everything. But he did invent the idea of space, a place with no absolute up or…

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The Andromeda Galaxy

Veteran Science Writer Says We Won’t Meet Intelligent Aliens

Not because they are not there but because vast interstellar distances make them unreachable

“It does not matter if intelligent life exists elsewhere. We will never find each other,” says veteran science writer Alex Berezow. He’s not saying they are not out there. He is throwing cold water on our chances of contacting them. Some things, he admits, have changed: Thanks to advances in astrophysics, we now know that there are billions of exoplanets in the Milky Way alone, leading most of the scientific community to conclude that life probably does exist elsewhere in the universe. Those who do not believe so are now considered the kooks. And while alien abductions are still not in the mainstream, UFOs are — so much so that the U.S. intelligence community just issued a report on them. Alex Berezow, “We are…

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Close encounters of the third kind. Unidentified objects coming from space. Contact with extraterrestrials UFO.

NASA Seeks Standards for ET Life Claims

The agency wants to develop a credibility scale so we know what to pay attention to

What with everything from Oumuamua to phosphine on Venus claiming our attention, NASA thinks it’s time to develop some standards for what constitutes a credible claim about extraterrestrial life: “The discovery of a potential biosignature in [a planet’s] atmosphere is important, but it’s just the start,” said Green in an interview. “You have to examine potential false positives, whether there are [non-biological] ways to form the chemical, whether the measurement is an artifact of your instrument, whether the environment on the planet is conducive or hostile to life, whether water is present.” Applying such a chain of reasoning could result in a kind of credibility scale for the general public to turn to when they read about new results in…

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Colorful exoplanet insolated on black

Why the Search for ET Now Focuses on Oceans in the Outer Planets

Some researchers are refining their ET life-tracking skills

The moons of the outer planets, research shows, have vast oceans and water is an essential ingredient of life as we know it. Natalie Elliot, a science writer with a specialty in astrobiology, explains, The hottest spots in the search for alien life are a few frigid moons in the outer solar system, each known to harbor a liquid-water ocean beneath its icy exterior. There is Saturn’s moon Titan, which hides a thick layer of briny water beneath a frozen surface dotted with lakes of liquid hydrocarbon. Titan’s sister Saturnian moon Enceladus has revealed its subsurface sea with geyserlike plumes venting from cracks near its south pole. Plumes also emanate from a moon that is one planet closer to the…

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The Earth from space. This image elements furnished by NASA.

Cornell: Earth Could Be Seen by ET Far More Easily Than Thought

Using analytic software, researchers can determine whether Earth would be visible from a given star system

According to Cornell and American Museum of Natural History researchers, “Scientists have identified 2,034 nearby star-systems — within the small cosmic distance of 326 light-years — that could find Earth merely by watching our pale blue dot cross our sun”: Scientists at Cornell University and the American Museum of Natural History have identified 2,034 nearby star-systems — within the small cosmic distance of 326 light-years — that could find Earth merely by watching our pale blue dot cross our sun. That’s 1,715 star-systems that could have spotted Earth since human civilization blossomed about 5,000 years ago, and 319 more star-systems that will be added over the next 5,000 years. Exoplanets around these nearby stars have a cosmic front-row seat to…

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Virus bacteria cells background

What If the UAP (UFOs) Are Much Simpler Life Forms Than We Think?

Why assume, if the unexplained phenomena are ET, that they are more advanced than we are? What if the opposite is true?

Readers will recall that on June 25, the Pentagon released a nine-page report on Unidentified Aerial Phenomena (UFOs) which signaled a significant change in attitude from debunking to carefully assessing. That is, we don’t know what’s out there but it’s something and we had better find out. The report references 144 incidents, of which investigators “could not explain”143. First, some reactions from science writers at Futurism: They were generally “disappointed” by the report’s uncertainty, accompanied by tantalizing hints: Reports of strange sightings made by US military pilots emerged after The New York Times published a series of mysterious videos in 2017, captured by military personnel and showing unidentified objects that seemed to defy the laws of physics. The June report,…

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Artificial Intelligence. Digital age in the global world of the future. 3D illustration of computer mind in decentralized cyberspace

ET Expert Thinks That ET Is Probably AI (Artificial Intelligence)

Given the immense interstellar distances, not being alive might be the only way ET could get here.

Search for Extraterrestrial Intelligence (SETI) astronomer Seth Shostak (pictured) confesses that these are exciting times for alien hunters like himself, what with the Pentagon’s anticipated July 25 report on unidentified aerial phenomena. Still, he doesn’t expect any big revelations: “I think it’s overwhelmingly likely that aliens are present in our galaxy. But I don’t believe they’re hanging out in our airspace. Not now, and not in historic times.” On the other hand, he goes on to say, every third star in our galaxy could host an Earth-like planet so the odds are we are not alone. Few life forms on Earth resemble humans, so why should extraterrestrials? But if we are not alone, what would ET be like? A gaseous…

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Flying saucers

The UAPs (UFOs) Are “Not Caused by Any U.S. Advanced Technology”

And that’s all the Pentagon probably really knows

June 25, the U.S. Department of Defense will release a report on UAPs (unidentified aerial phenomena), a term now preferred to UFOs (unidentified flying objects). A number of unusual sightings since 2017 prompted Congress to ask for a report. According to space industry reporter Leonard David, the justification is airspace safety and control, not an effort to support or refute claims about alien spacecraft: “The report’s firmest conclusion, it seems, is that the vast majority of UAP happenings and their surprising maneuvers are not caused by any U.S. advanced technology programs.” That might mean, for example, UAP are entirely homegrown products of revolutionary and clandestine technological advances, whether by other countries now challenging American airspace or by the U.S. itself…

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Full moon in a black night sky

Sixty Billion Stars. And No Aliens? What Now?

Are we approaching a crisis of faith in ET?

At Universe Today, Matt Williams asks if it is time to update the Drake Equation, by which you could settle — in your own mind — how likely the aliens are. It began to be developed nearly sixty years ago at a conference at the National Radio Astronomy Observatory in Green Bank, West Virginia. And everyone took for granted that we would be hearing from the aliens soon. That was the basis of Search for Extraterrestrial Intelligence (SETI) — keeping the hope alive. Rather than being an actual means for quantifying the number of intelligent species in our galaxy, the purpose of the equation was meant to frame the discussion on SETI. In addition to encapsulating the challenges facing scientists,…

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Aliens Invade

Sci-Fi Saturday: In Fenestra, the Aliens Land in a Domestic Drama

As the alien ships loom worldwide, the cheating boyfriend thinks he can just come back…

“Fenestra” (2020) at DUST by Jason Sheedy (May 13, 2021, 3:49 min) “A heartbroken woman must contend with a cheating boyfriend — and an incoming alien invasion.” Review: Okay. What if the aliens land just as a guy wants his woman to know that he is sorry for cheating on her after six faithful years. Of course, he counts on coming back to her amid the chaos. But maybe his stepping out was happening at just the right time for her… Who is she anyway? Erin Ownbey does a good job of looking pretty fed up and Brett Brooks of just not getting it. Impressive alien ships. “Fenestra” is under four minutes in length, which is handy if you would…

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red dwarf star sun space view, 3d render

Could Red Dwarf Stars Host Planets With Intelligent Life?

Red dwarfs are much more numerous than brighter yellow dwarfs like our sun

Our Sun is a yellow dwarf star, shiny but comparatively short-lived. Red dwarfs are said to be the most common and longest-lived type of star in our galaxy. They are long-lived because they do not emit much radiance. How large are their habitable zones? A key problem turns on how much light they emit that is useful for life. That was quite a topic of discussion earlier this year at Centauri Dreams (dedicated to “Imagining and Planning Interstellar Exploration”). Astronomer and mathematician Henry Cordova offers some thoughts: All else being equal, the radiant flux received by the planet must then be directly proportional to the luminosity of the star, and inversely proportional to the square of the planet’s distance from…

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alien

Zoologist: Law of Evolution Can Predict What Aliens Will Be Like

Arik Kershenbaum’s new book argues that convergent evolution on Earth helps us understand what to expect from extraterrestrial life

Cambridge zoologist Arik Kershenbaum, author of Zoologist’s Guide to the Galaxy (2021), thinks that convergent evolution here on Earth can offer us guides to what must happen on other planets that can support life. “Convergent evolution” means that radically different life forms arrive at the same solutions. He told science writer Dan Falk in an interview: Sometimes this “convergence” of traits is for something obviously useful, like wings. But sometimes convergence produces bizarrely similar creatures that share so many characteristics, it can be hard to believe they’re not closely related. The recently extinct thylacine [a large predatory marsupial native to Tasmania and mainland Australia], for example, could easily be mistaken for a peculiar breed of dog, but it’s much more…

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alien portrait with stars

SETI Director Warns: Those Aliens Could Be Malevolent

Harvard astronomer agrees: We’ve sent a lot of signals in recent years; they may have got them. But now what?

As the Mars Rover Perseverance bumps around looking for fossil bacteria and such, many students of possible ET life are becoming surprisingly cautious about what it might mean: “We have no reason to believe that technological advancement and altruism or morality are somehow linked,” SETI researcher Andrew Siemion told Inverse. “There probably are malevolent civilizations elsewhere in the universe so that’s certainly something that we should consider as we continue to explore the universe.” Siemion, who’s the director of the Berkeley SETI Research Center and principal of the alien-hunting Breakthrough Listen project, is invoking a tension at the heart of any project searching for alien life. Successfully finding it would change the world — but there’s also no guarantee humanity…

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Mars 2020 Perseverance Rover is exploring surface of Mars. Perseverance rover Mission Mars exploration of red planet. Space exploration, science concept. .Elements of this image furnished by NASA.

Why Some Experts Hope We DON’T Find Life on Mars

Many thinkers worry about what will happen if the extraterrestrials land. But will they feel worse if we never find ET?

Recently, prominent theoretical physicist Michio Kaku (pictured) told media that reaching out to extraterrestrials is a “terrible idea.” Kaku, author of The God Equation: The Quest for a Theory of Everything (2021). So long SETI, after all these years? Well, not quite. He explains, Soon we’ll have the Webb telescope up in orbit and we’ll have thousands of planets to look at, and that’s why I think the chances are quite high that we may make contact with an alien civilisation. There are some colleagues of mine that believe we should reach out to them. I think that’s a terrible idea. We all know what happened to Montezuma when he met Cortés in Mexico so many hundreds of years ago.…

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alien world, exoplanet in the habitable zone, planet with moon, water and plant life

Could the Universe Be Swimming in Watery Planets?

A new hypothesis of planet formation means that watery worlds may be common rather than rare

As the Mars Rover Perseverance motors around looking for evidence of past life on a now- mostly dry planet, some researchers are asking, can we be sure that most planets in our galaxy are dry? A common assumption among exoplanet experts is that most planets got their water via a chance hit early on from an icy asteroid. But researchers from the GLOBE Institute at the University of Copenhagen offer an alternative scenario, based on the millimetre-sized particles of ice and carbon that orbit all the young stars in our Milky Way galaxy. If masses of these particles are incorporated into a planet from its beginning, it isn’t a matter of chance whether the planet has water. It is a…

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Extremely detailed and realistic high resolution 3d illustration of a Grey Alien standing in a forest

What If Extraterrestrials Can’t Afford To Take Chances With Us?

That’s the Dark Forest Hypothesis, riffing off the title of one of famed Chinese sci-fi author Liu Cixin’s novels

In recent months we’ve been looking at science writer Matt Williams’s coverage of the many reasons (links below) people have advanced as to why we do not see extraterrestrials except at the movies. Last Saturday, we considered the Aurora Hypothesis: Given the difficulties and risks of space travel, extraterrestrials with advanced technology may have visited Earth only one in a million years, researchers say. Another hypothesis that Williams has examined is the Dark Forest Hypothesis. He begins by noting that space exploration necessarily conjures up the notion of risk: “Words like Rim, Edge, Fringe, and Verge, Beyond, Perimeter, and Periphery all conjure up feelings of intrigue and anxiety – no doubt, in different measures for different people”: This particular proposed…

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Futuristic Mars Space Scene with Large Moon

The Aurora Hypothesis: ET Could Risk Only Rare Contact With Us

Given the difficulties and risks of space travel, extraterrestrials with advanced technology may have visited Earth only one in a million years, researchers say

In recent months we’ve been looking at science writer Matt Williams’s coverage of the many reasons (links below) that have been advanced as to why we do not see extraterrestrials except at the movies. Last Saturday, we considered the Percolation Hypothesis, whose beauty is its common-sense simplicity: The aliens can’t overcome the laws of physics, any more than we can. In the real world, barriers like years between communications even at the speed of light would take a toll on adventurousness. Another hypothesis that Williams has examined is our focus today, the Aurora Hypothesis, “just because planets are habitable doesn’t mean that intelligent life can colonize there.” (Williams) The thesis has had a busy life in science media. Its earliest…

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Nebula and stars in deep space, glowing mysterious universe. Elements of this image furnished by NASA

Is Real-World Space Travel Just Too Daunting for ET?

That’s the Percolation Hypothesis as to why we don’t make contact with aliens. They can’t overcome the laws of physics, any more than we can

Last week we looked at another reason that has been advanced, as to why we do not see extraterrestrials except at the movies. Science writer Matt Williams has been looking at the reasons (see the links below.) Last Saturday, we looked at the possibility that Earth is unusual in that it is a rocky planet whose intelligent inhabitants live on the surface. Many rocky planets and moons with icy surfaces may have interior oceans that harbor life.: In that case, intelligent life may not think of space exploration. Another hypothesis that Williams has examined is the Percolation Theory Hypothesis, that there are limits imposed by the laws of physics as to what intelligent life forms can do by way of…

Slime molds

Slime Mold: An Earthbound “Alien” That Thinks Without a Brain

Researchers are beginning to learn just how giant molds can remember things without a nervous system. What, exactly, is doing the computations?

Turns out, it’s all in the tubes. The slime mold Physarum polycephalum is a single cell, often very large. The way Physarum gets to be so large is that when it divides, the many single cells merge into one giant cell — with no nervous system: “Its body is a giant single cell made up of interconnected tubes that form intricate networks. This single amoeba-like cell may stretch several centimeters or even meters, featuring as the largest cell on earth in the Guinness Book of World Records. Technical University of Munich (TUM), “A memory without a brain” at ScienceDaily (February 23, 2021) The paper is closed access. But how does the giant Physarum cell, with no brain, mouth, limbs, or…

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Jupiter's moon Europa in front of the planet Jupiter

Is Intelligent Life Found in Oceans Inside Planets and Moons?

The Ocean Planets Hypothesis is that intelligent beings may flourish in the interior oceans of the moons of gas giant planets — or within exoplanets — but they are trapped there

Readers will recall that last year, we were looking at science writer Matt Williams’s analysis of the various reasons that we do not see extraterrestrials except at the movies. (See the links below.) Last time out in November, we looked at the Transcension Hypothesis: The extraterrestrial intelligences exist—but after a Singularity, they became virtual intelligences, exploring inner space at an undetectably small scale. Williams has reported since then on some additional hypotheses so this week we look at a more conventional approach — the “Ocean Worlds” Hypothesis, that icy planets may have interior oceans that harbor life: To illustrate, there’s the search for life that is going on right now in the Solar System, which is almost entirely focused on…