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The Alien Observatory --“Extinction is the Cosmic Default for Most Life That Has Emerged in the Universe" (WATCH Video)

 

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Something Enrico Fermi overlooked: scientists from the Australian National University’s Research School of Earth Sciences think the reason we haven’t found signs of advanced technological life might be because all the aliens went extinct. “Extinction is the cosmic default for most life that has ever emerged,” the authors of the study write.

In a 2016 study published in the journal Astrobiology, Aditya Chopra and his colleagues do a good job detailing something already well established but not necessarily articulated enough among the scientific community at large: the window is too short to allow that life to evolve fast enough where they can survive in the long run.

 

"The universe is probably filled with habitable planets, so many scientists think it should be teeming with aliens," said Dr Aditya Chopra from the ANU Research School of Earth Sciences and lead author on the paper, which is published in Astrobiology. "Early life is fragile, so we believe it rarely evolves quickly enough to survive. Most early planetary environments are unstable. To produce a habitable planet, life forms need to regulate greenhouse gases such as water and carbon dioxide to keep surface temperatures stable."

About four billion years ago Earth, Venus and Mars may have all been habitable. However, a billion years or so after formation, Venus turned into a hothouse and Mars froze into an icebox.

 

 

Early microbial life on Venus and Mars, if there was any, failed to stabilize the rapidly changing environment, said co-author Associate Professor Charley Lineweaver from the ANU Planetary Science Institute.

"Life on Earth probably played a leading role in stabilizing the planet's climate," he said. The ESO image above is an artist's impression of Mars some 4 billion years ago with it's northern ocean.

"The mystery of why we haven't yet found signs of aliens may have less to do with the likelihood of the origin of life or intelligence and have more to do with the rarity of the rapid emergence of biological regulation of feedback cycles on planetary surfaces," Chopra said.

Wet, rocky planets, with the ingredients and energy sources required for life seem to be ubiquitous, however, as physicist Enrico Fermi pointed out in 1950, no signs of surviving extra-terrestrial life have been found.

A plausible solution to Fermi's paradox, say the researchers, is near universal early extinction, which they have named the Gaian Bottleneck.

"One intriguing prediction of the Gaian Bottleneck model is that the vast majority of fossils in the universe will be from extinct microbial life, not from multicellular species such as dinosaurs or humanoids that take billions of years to evolve," said Associate Professor Lineweaver.

 A copy of the paper can be downloaded at http://bit.ly/gaianbottleneck.

The Daily Galaxy via Australian National University

 

 

Comments

"Extinction is the cosmic default for most life that has ever emerged"

Conclusion drawn from a data set of one, said data set disproving conclusion.

Well said O....but Fermi's paradox remains....where are they?

"Extinction is the cosmic default for most life that has ever emerged"

LOL! Is that so?! Please, scientists from the Australian National University’s Research School of Earth Sciences, you forgot to provide all the data you collected from all the other alien species you found to make that statement.

It's nice we all have unlimited imaginations so we can write articles such as this.

We're facing extinction by having robots kill all of us and having them make us extinct, so we need to stop companies from manufacturing those robots, or were done for.

My guess is there is a very brief window when we can detect alien life. That window being when a species sends out signals we can detect. That would be strong radio waves. In our case a window of a hundred years plus as long as it takes to find a better means of communication that doesn't include those signals. Perhaps a hundred more but probably less. As our tech gets stronger our reliance on brute force in telecommunications gets less and less.
We could perhaps find evidence for some life, ie oxygen on other planets but we've only just begun and are still looking at the easier M and white Dwarfs which are unlikely to harbor life. Once we get equipment and software that can detect planets and their atmosphere circling F and G type stars in the Goldilocks zone then we'll know a whole lot more.
In the mean time as O says this article is a load of BS.

John, the answer is 'out there.' Solipsism is unbecoming as a modus operandi. Fermi's paradox is a much too shallow a formula to be anything more than a step off on conjecture. Desire, dimension and economics are lacking, for instance.

by the time we could observe star life in light years, that life is gone. Our observation of the sun is 8 minutes late, alpha centauri 4 light years late, and the big bang creator is millenium gone, so it's all over except for the Tru Reality Life is Now'm, which is what we live for. To consider space time is the influence which alien life creates here, that humans are, or are becoming. SolarIS is this living Star and we are in the Real UniversIS of the Now'NU', so that is another matter, because it is not matter at all. It is here now, as we are, but it must be recognized, for it to be realized. Isness is endless, and this IS always invisible, like alien life that does exist now, and/but when we see this, we see and know reality, get beyond fermi paradox, and have found our way beyond creation into the real UniversIS. Get to the ahead of creation, at the point of the IS, in the NU now reality, shine like the Sun, and be the Star YU R. Einstein is the Em2 relativity of the six layers of creation, but SolarIS is the formula of the Seven Universes folds, and its true Reality Life IS. This is the Golden Mean. and as such the Golden Ratio, so when we are able to apply this to our systems or creating, it may be even this world will begin to appear as the Try Reality, as we build the NU UniversIS now. From the SolarIS E-bok.

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