We are not alone?

[Luckyone]

NASA Discovers ‘Clearest Sign’ Yet of Ancient Life on Mars in a Rock Studied by the Perseverance Rover​

Minerals in the rock might have been produced by microbes in chemical reactions, but researchers say they’ll need to examine the sample more closely to know for sure​

 

[alang1216]

NASA Discovers ‘Clearest Sign’ Yet of Ancient Life on Mars in a Rock Studied by the Perseverance Rover​

Minerals in the rock might have been produced by microbes in chemical reactions, but researchers say they’ll need to examine the sample more closely to know for sure​

I can safely say (safely since I'll be long gone before I'm proved either right or wrong) that life will be found to be common in the universe and almost every solar system will be found to have life. The vast majority will be VERY primitive, not even to the cellular level but that will leave plenty of planets with complex life and a very tiny fraction of those will have intelligent life.

 

[midcan5]

No rock is alone there are lots of rocks.

The origin of life on Earth, explained

The origin of life on Earth stands as one of the great mysteries of science. To find out if we are alone in the galaxy, we will need to better understand what geochemical conditions nurtured the first life forms. Several seminal experiments in this topic have been conducted at the University of...

news.uchicago.edu

 

[ding]

almost every solar system

Can you define almost? Is that 99%? 95%? 90% 85%? 80%

Because no. That's not likely. Do the math. But yes, where the conditions exist for life to arise, given enough time, life will likely arise. The laws of nature and the structure of matter are finely tuned to produce life.

Arthur Eddington, the great British physicist, gave us a formula: one hundred billion stars make a galaxy, and one hundred billion galaxies make a universe. The lowest estimate I have ever seen of the fraction of them that might possess a planet that could support life is one percent. That means one billion such places in our home galaxy, the Milky Way; and with about one billion such galaxies within reach of our telescopes, the already observed universe should contain at least one billion billion -- 10<span>18</span> -- places that can support life

George Wald: Life and Mind in the Universe

 

[alang1216]

Can you define almost? Is that 99%? 95%? 90% 85%? 80%

Because no. That's not likely. Do the math. But yes, where the conditions exist for life to arise, given enough time, life will likely arise. The laws of nature and the structure of matter are finely tuned to produce life.

Based the only solar system we know about, every single one might contain life. Can I define almost? No. Do we have any idea what the conditions are for life to exist? Not really. Could it exist in the clouds of Venus or the oceans of Europa? Maybe.

 

[ding]

Based the only solar system we know about, every single one might contain life. Can I define almost? No. Do we have any idea what the conditions are for life to exist? Not really. Could it exist in the clouds of Venus or the oceans of Europa? Maybe.

And you believe one data point is a statistically valid representation?

I'm guessing you have never looked at the conditions for life to exist based upon your statement.

 

[MarathonMike]

Let's have NASA and the DOD stop stonewalling about UAPs and alien biologics that very credible witnesses are telling us about in sworn testimony. It's clear that they are not aggressive or they would have already killed or enslaved us by now.

 

[ReinyDays]

I don't want to cast doubt on this finding ... but we've been through this before ...

The proof given in the article is "listen, we can’t find another explanation" ... and that's profoundly non-scientific ... if we dig deeper, I'm sure we'll find the researches have no specific microbe in mind ... indeed we'll find there's no microbe known to man that can form this mineral ...

Doesn't mean there is no microbe ... I'm not saying that ... what I am saying is without the microbe in hand, it's strictly conjecture any microbe formed this mineral ... on top of the conjecture there's any life at all on Mars ... it does seem to be completely sterile and so far none of the more common, easier to form organic minerals ... I'm looking at you calcium carbonate ...

 

[playtime]

We are not alone?​

no.

 

[sparky]

It would be arrogant to think one grain of sand on a whole beach is special......~S~

 

[Clipper]

I can safely say (safely since I'll be long gone before I'm proved either right or wrong) that life will be found to be common in the universe and almost every solar system will be found to have life. The vast majority will be VERY primitive, not even to the cellular level but that will leave plenty of planets with complex life and a very tiny fraction of those will have intelligent life.

There are billions if not trillions of galaxies in the known universe. Galaxy's, like the Milky Way. There is life out there. Even a small fraction means that there may be millions of planets inhabited by life in one form or another. But, we'll never know for sure.

 

[alang1216]

There are billions if not trillions of galaxies in the known universe. Galaxy's, like the Milky Way. There is life out there. Even a small fraction means that there may be millions of planets inhabited by life in one form or another. But, we'll never know for sure.

On the other hand, I believe the answer to the Fermi paradox is that the aliens are already here, we just can't see them. I have theories but zero evidence.

 

[maj]

There actually is evidence of beings visiting earth eons ago. Whether you want to call them "martians" or not is up to you.

 

[westwall]

And you believe one data point is a statistically valid representation?

I'm guessing you have never looked at the conditions for life to exist based upon your statement.

We have no idea how many life forms are possible, or what parameters they need.

We used to believe that all life on earth derived from the Sun via photosynthesis.

Now we know that chemosynthesis is also a source for life based on the life clustering around black smokers at the bottom of the oceans.

The mathematics of life say that yes, life is most likely everywhere in the universe. We are just too far away to interact with it.

Robert L. Forward wrote an excellent book back in the 1970's IIRC called "Habitable Planets for Man".

It's quite good.

 

[ding]

We have no idea how many life forms are possible, or what parameters they need.

We used to believe that all life on earth derived from the Sun via photosynthesis.

Now we know that chemosynthesis is also a source for life based on the life clustering around black smokers at the bottom of the oceans.

The mathematics of life say that yes, life is most likely everywhere in the universe. We are just too far away to interact with it.

Robert L. Forward wrote an excellent book back in the 1970's IIRC called "Habitable Planets for Man".

It's quite good.

Would you say the universe is mostly hospitable for life or mostly inhospitable for life?

 

[westwall]

Would you say the universe is mostly hospitable for life or mostly inhospitable for life?

The space between the planets is certainly devoid of life, so because that is the primary nature of the universe, so obviously inhospitable based on that.

However, where life IS possible, it stands to reason that it will be there.

 

[ding]

Planetary conditions required for life include liquid water, a source of energy, a supply of nutrients (like carbon), a stable atmosphere for protection and regulating temperature, a suitable planetary mass for gravity and atmospheric retention, and an orbit within the habitable zone of a star. These factors, in combination with a stable environment for a sufficient time, provide the necessary physical and chemical ingredients for life to arise and evolve.

Essential Ingredients

• Liquid Water:
  Water is essential for the many chemical reactions of known life and acts as a solvent, making it a fundamental requirement.
  
  
• Nutrients (Carbon-based):
  Life as we know it is carbon-based and requires a supply of carbon and other elements (like phosphorus and potassium) for organic molecules to form.
  
  
• Energy Source:
  An energy source, either from a star's light (like photosynthesis) or from chemical sources (like hydrothermal vents), is needed to fuel metabolic reactions and drive biological processes.
  

Planetary Characteristics

• Habitable Zone (Goldilocks Zone):
  A planet must be the right distance from its star, not too close to be too hot and not too far to be too cold, allowing for liquid water to exist on its surface.
  
  
• Stable Atmosphere:
  An atmosphere provides protection from harmful solar and cosmic radiation, helps regulate temperature, and can sustain a climate suitable for life.
  
  
• Appropriate Size and Mass:
  A terrestrial planet of the right size is needed to retain an atmosphere and possess gravity sufficient to hold it, and potentially to support complex life through phenomena like plate tectonics.
  
  
• Stable Environment:
  The planet needs a long-term stable environment, which includes a stable orbit and a balanced climate, to allow sufficient time for life to arise and evolve.

• Magnetic Field:
  Earth's magnetic field shields the planet from harmful solar winds, contributing to a stable environment for life.
  AI Overview
  
  The Moon has improved conditions for life by stabilizing Earth's axial tilt, which provides stable seasons and a consistent climate. It also creates tides, which are crucial for mixing ocean water and creating valuable intertidal habitats for organisms. Additionally, the Moon's gravitational influence slowed Earth's rotation, extending the length of the day, and may have previously shared a magnetic shield with Earth, protecting the atmosphere from harsh solar radiation.
  
  
  • Stabilized Earth's Tilt and Climate:
    The Moon's gravitational pull keeps Earth's axial tilt from wobbling dramatically, preventing extreme fluctuations in climate and seasons that would likely be devastating to life.
    
    
    
  • Generated Tides:
    The Moon's gravitational force creates tidal bulges in Earth's oceans, which are essential for mixing ocean water and creating intertidal zones. These zones are rich habitats for a variety of plants and animals that rely on the daily cycle of submersion and exposure.
    
    
  • Influenced Biological Rhythms:
    The Moon's phases and gravitational pull influence the life cycles and behaviors of many organisms. For example, lunar cycles trigger mass spawning events in corals and affect the migration patterns of birds and other animals.
    
    
  • Slowed Earth's Rotation (Extended the Day):
    When Earth was young, its day was only a few hours long. The Moon's gravitational interaction has gradually slowed our planet's rotation, resulting in the longer, more manageable days we experience now.
    
    
  • Potentially Protected the Early Atmosphere:
    Some scientists theorize that in its early history, Earth and the Moon shared a magnetically connected system. This coupled magnetic field may have acted as a barrier against high-energy solar wind particles, preventing the atmosphere from being stripped away, which is vital for life.

 

[ReinyDays]

We have no idea how many life forms are possible, or what parameters they need.

We used to believe that all life on earth derived from the Sun via photosynthesis.

Now we know that chemosynthesis is also a source for life based on the life clustering around black smokers at the bottom of the oceans.

The mathematics of life say that yes, life is most likely everywhere in the universe. We are just too far away to interact with it.

Robert L. Forward wrote an excellent book back in the 1970's IIRC called "Habitable Planets for Man".

It's quite good.

The sad part is we will never be able to study any life "out there" in any kind of detail ... furthest man-made object out there is only 0.2% of one light-year ... or 1/2,000th of the way to the nearest star ... that took 50 years ... just a measly 100,000 more years to get to the Alpha Centuri system ... another 100,000 years to get back if and only if the inhabitants fill the tank up ...

They don't take American Express or VISA ... lucky thing MasterCard is accepted everywhere we want to be ...

 

[ReinyDays]

Would you say the universe is mostly hospitable for life or mostly inhospitable for life?

Empty space is inhospitable to life ... and the universe is mostly empty space ...

Your AI answer is just the standard CW ... and we have all these things on Mars ... but no life ... why is that? ...

 

[ding]

Empty space is inhospitable to life ... and the universe is mostly empty space ...

Your AI answer is just the standard CW ... and we have all these things on Mars ... but no life ... why is that? ...

Because life in the universe is extremely rare and limited. Which would be especially true for higher life forms. With that said, the universe is massive and it would be unlikely if we were the only beings that know and create. Why? Because the laws of nature are finely tuned for life to arise when the conditions for it exist and enough time has passed.