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The Fermi Paradox: Extinction

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The Fermi Paradox ask us how in a Universe so vast and ancient we seem to be the only intelligent civilization around, with no older interstellar alien empires visible in the galaxy. But could extinction play a role in that, or might extinction events instead drive evolution forward?

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Credits:
The Fermi Paradox: Exctinction.
Episode 204, Season 5 E37

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Aliens likely haven’t visited because humanity’s technological signature is very limited

There are likely many exciting alien worlds for extraterrestrials to visit.

Now that more and more scientists are actively searching for signs of extraterrestrial life, whether in our solar system or in the far reaches of space, more attention has been brought to the Fermi paradox.

A new study in preprint server arXiv suggests that we might not have encountered intelligent extraterrestrials because they may not find humanity very interesting.


Mik38/iStock.

The Fermi paradox posits that we should have detected intelligent alien life by now, given the fact there are billions of planets in the habitable zone of their solar system in the Milky Way alone. So where are they?

Scientists find ‘unusual, intense blast of energy’ from nearby galaxy

A massive blast of light considered extremely rare and is believed to have been triggered by the collision of stars with a black hole that hit the Earth recently and which could help change our understanding of the universe, scientists revealed.

The event called a gamma-ray burst (GRB), which lasted for only 50 seconds, came from a nearby galaxy in December 2021. These blasts are considered to be the most powerful explosions in the universe.

Earlier, it was believed that GRBs only resulted from the destruction of massive stars, but astronomers now believe that it can come from the combination of two neutron stars.

Men are losing their Y chromosome, and rats could show our future

What alternative sex-determining system will we adapt?

The sex of human and other mammal babies is decided by a male-determining gene on the Y chromosome. But the human Y chromosome is degenerating and may disappear in a few million years, leading to our extinction unless we evolve a new sex gene.

A new paper in Proceedings of the National Academy of Science shows how the spiny rat has evolved a new male-determining gene.


Usis/iStock.

The good news is two branches of rodents have already lost their Y chromosome and have lived to tell the tale.

Potential Answer for Fermi Paradox

You can buy Universe Sandbox 2 game here: http://amzn.to/2yJqwU6

Hello and welcome to What Da Math!
In this video, we will talk about alien life.

Links: http://www.qsl.net/pa2ohh/jsffield.htm.
http://www.seti.org.au/spacecom/setionabudget.html.
https://en.wikipedia.org/wiki/Link_budget.
https://en.wikipedia.org/wiki/List_of_interstellar_radio_messages.
http://www.spaceacademy.net.au/spacelink/spcomcalc.htm.

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Vladimir Putin’s Health Called Into Question After Russian Leader Looks ‘Critically Ill’ During Chilling Nuclear War Warning To Ukraine

Earth has been hit by an intense, unusual blast of light that could change our understanding of the universe, scientists have said.

Late last year, scientists spotted a 50-second-long blast of energy coming towards Earth, known as a gamma-ray burst or GRB, which are the most powerful explosions in the universe. Immediately, researchers started looking for the afterglow that such blasts leave behind, with that visible light being useful to find where the blast has come from.

The Fermi paradox: Are we alone in the universe?

Two possibilities exist: Either we are alone in the universe or we are not. Both are equally terrifying. ~Carl Sagan.

Looking up at a starry night sky makes one wonder if we are really alone. If you have never asked yourself this question, here’s some perspective on the vastness of our universe.

And this is just one galaxy.


IStock / Jasonfang.

On the best of conditions, you could, in theory, count around 5,000 stars with the naked eye. The image below shows the comparison between our galaxy (the Milky Way) and our sun. Our night sky (5,000) stars will just be another small dot in comparison with the Milky Way.

Megatsunami on Mars linked to an asteroid strike 3.4 billion years ago

The event is likened to the Chicxulub collision on Earth.

A study has found that the megatsunami that swept Mars around 3.4 billion years ago was caused by an asteroid strike on one of its oceans. The event is compared to the likes of the Chicxulub collision—which is believed to have wiped out dinosaurs from the face of the earth about 66 million years ago.

Researchers, led by Alexis Rodriguez of the Planetary Science Institute in Arizona, have also suggested that NASA’s Viking 1 Lander, which was deployed on a mission to find evidence of life on Mars in 1976, could have landed near the crater of this megatsunami.


Michalz86/iStock shannonstent/iStock Dominic Jeanmaire/iStock.

The new study published in the journal Scientific Reports analyzed “maps of Mars’ surface, created by combining images from previous missions to the planet, and identified an impact crater that could have caused the megatsunami,” as mentioned in the press release.

Cause of Cambrian Explosion — Terrestrial or Cosmic?

We review the salient evidence consistent with or predicted by the Hoyle-Wickramasinghe (H-W) thesis of Cometary (Cosmic) Biology. Much of this physical and biological evidence is multifactorial. One particular focus are the recent studies which date the emergence of the complex retroviruses of vertebrate lines at or just before the Cambrian Explosion of ∼500 Ma. Such viruses are known to be plausibly associated with major evolutionary genomic processes. We believe this coincidence is not fortuitous but is consistent with a key prediction of H-W theory whereby major extinction-diversification evolutionary boundaries coincide with virus-bearing cometary-bolide bombardment events. A second focus is the remarkable evolution of intelligent complexity (Cephalopods) culminating in the emergence of the Octopus. A third focus concerns the micro-organism fossil evidence contained within meteorites as well as the detection in the upper atmosphere of apparent incoming life-bearing particles from space. In our view the totality of the multifactorial data and critical analyses assembled by Fred Hoyle, Chandra Wickramasinghe and their many colleagues since the 1960s leads to a very plausible conclusion – life may have been seeded here on Earth by life-bearing comets as soon as conditions on Earth allowed it to flourish (about or just before 4.1 Billion years ago); and living organisms such as space-resistant and space-hardy bacteria, viruses, more complex eukaryotic cells, fertilised ova and seeds have been continuously delivered ever since to Earth so being one important driver of further terrestrial evolution which has resulted in considerable genetic diversity and which has led to the emergence of mankind.

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