Second, if you have evidence, then by all means post it. I see you suggesting there is but don't bother to post a single shred of it. Third, evidence in the court of law is by far no where the same as scientific evidence for proving X. For example, in a court room a witness can testify to seeing something and have that counted as evidence. In science, first hand eye witness testimony is not considered viable evidence.
Wrong the burden of proof is on those that say there is proof to begin with. Again odds are there is life beyond Earth, I believe this highly but the simple FACT is, we currently do not have proof. As for atoms, electrons and so on, at one point, we had theories of such but we didn't have the proof. Over time proof was gathered, it may have always been there but it wasn't known and wasn't within our reach to gather it. So in a sense if there is proof of alien life, we just don't currently have it. So unless you can provide said evidence, then you're talking out of your ass by saying there is a wealth of it.
In all fairness there is as much proof of alien existence as there is for god, which is none. The odds say we are not alone, given the vast size of space and the amount of stars and planets. We know the materials for life exists elsewhere. We know life "can" exist off planet Earth. We DO NOT how ever have evidence of alien life itself. So while it is astronomically silly to think we are the only planet with life, as of yet, we are the only planet that we know for sure that has it.
No where do I deny the probability or likelihood of the existence of alien life, I deny that proof or evidence for it currently exists.
As for your tree example. You have evidence of a tree, you have evidence that it fell, what remains is the how. The bigger picture is that you still have evidence, even if it's partial. There is no evidence for alien life, period.
I see your challenge of evidence, but please, in return do me the favor of seeing this challenge...
You state that there is the probability, likelihood, odds, that you believe this highly, to the point of otherwise being silly, that alien life exists. Yet you state over and over that there is no evidence and/or proof. How is it not irrational to be so sure of something while at the same time claiming to have no evidence? How is it not unreasonable to advocate an opinion or position while also advocating a lack of evidence for that same position? How can you have an opinion without any information about it's subject? How can you speak to an issue with authority, declaring that there is no evidence, without being well informed on that issue?
Because of some of your other statements, I'd normally give you the benefit of the doubt. Maybe you just misspoke several times, maybe you got confused about what constitutes evidence and proof in a court of law or in the scientific method. However, because of some of your other comments I'd take you to task for an explanation of this.
Being intellectually honest, reasonable, and rational, you must admit that something you know has led you to a conclusion. It is irrational and unreasonable to draw a conclusion that is based upon no evidence. It is also unreasonable and irrational to claim that although you have somehow convinced yourself of a conclusion in a logical manner, that someone else who has come to the same conclusion cannot have evidence to support that conclusion.http://en.wikipedia....i/Proof_(truth)http://en.wikipedia.org/wiki/Evidence
Ok first off, you attempt to use another example that already contains proof of it's existence, the sun and the Earth. The evidence of both is there readily available to all.
The point here was lost completely… The Earth and Sun were known to exist in the 17th century, of course, but the fact of heliocentricity was extremely controversial. If someone asked Galileo for proof of heliocentricity, he would show them celestial observations and mathematical equations. There was no definitive proof like a picture or a video or a trip to space to watch. It was circumstantial evidence. Evidence as used in a court of law and in the scientific method
You're correct that eye witness testimony is highly fallible and not used in the scientific method as it is in a court of law. Fortunately, I won't need to call anyone to the stand. The most plentiful type of evidence used in science, which is also extremely common in law, is circumstantial evidence.
On its own, it is the nature of circumstantial evidence for more than one explanation to still be possible. Inference from one piece of circumstantial evidence may not guarantee accuracy. Circumstantial evidence usually accumulates into a collection, so that the pieces then become corroborating evidence. Together, they may more strongly support one particular inference over another. An explanation involving circumstantial evidence becomes more valid as proof of a fact when the alternative explanations have been ruled out.
Circumstantial evidence allows a trier of fact to deduce a fact exists. In criminal law, the inference is made by the trier of facts in order to support the truth of assertion (of guilt or absence of guilt).
: The weight of the Earth is calculated using the gravitational constant and the distance to the center of the Earth. No one actually put it on a scale that had been tested for accuracy. It was measured indirectly by circumstantial evidence.http://www.scientifi...e-weight-of-earExample
: Most of planets found to exist outside of our solar system have been determined to exist by measuring the fluctuations in light of it's host star, or using gravitational lensing. It is most certainly determined by circumstantial evidence. http://en.wikipedia....rasolar_planetsEvidence, wealth
In order for the concept that life is common and abundant in the galaxy to be a valid position, these conditions would logically need to be met.
1: Planets must exist outside of the solar system.
2: There must be a significant amount of Earth-like planets where life can take hold and thrive.
3: The materials that create life should be abundant and wide spread throughout the galaxy.
4: Life must not be fragile, but rather able to survive robustly in harsh environments.
5: If life is not an aberration on Earth, there should be evidence that the processes of the Universe create the possibility for life in the same way those processes create the possibility for galaxies, stars, and planets.Facts, quotes, links1-2 Planets must exist outside of our solar system and Earth-like planets should be abundant
One or more bound planets per Milky Way star from microlensing observations
Here we report a statistical analysis of microlensing data (gathered in 2002–07) that reveals the fraction of bound planets 0.5–10 au (Sun–Earth distance) from their stars. We find that of stars host Jupiter-mass planets (0.3–10 MJ, where MJ = 318 Mcircle plus and Mcircle plus is Earth’s mass). Cool Neptunes (10–30 Mcircle plus) and super-Earths (5–10 Mcircle plus) are even more common: their respective abundances per star are and .
Recently, a population of planets that are unbound or very far from their stars was discovered by microlensing. These planets are at least as numerous as the stars in the Milky Way.
We conclude that stars are orbited by planets as a rule, rather than the exception.
Many Billions of Rocky Planets in Habitable Zones Around Red Dwarfs in Milky Way
"Our new observations with HARPS mean that about 40% of all red dwarf stars have a super-Earth orbiting in the habitable zone where liquid water can exist on the surface of the planet," says Xavier Bonfils (IPAG, Observatoire des Sciences de l'Univers de Grenoble, France), the leader of the team. "Because red dwarfs are so common -- there are about 160 billion of them in the Milky Way -- this leads us to the astonishing result that there are tens of billions of these planets in our galaxy alone."
There are estimated to be 200-400 billion stars in the Milky Way galaxy. Some stars probably don't have any planets, and some stars probably have more than the eight planets of our Sun. Most stars have at least one planet.
A conservative compromise of these estimates and the evidence is that there are around one trillion planets in the Milky Way galaxy orbiting stars. This assumes that there are around 300 billion stars in the galaxy and an average of almost 3.5 planets for every star.
This is a trillion planets. Most planets probably don't have the properties that we would consider to be conducive to life. Though, life could just as easily take hold on a moon of a giant planet, like Jupiter. Consider that Jupiter has 63 and that Saturn has 62 known moons.3-5 The materials that create life should be abundant and wide spread throughout the galaxy. There should be evidence that the processes of the Universe naturally create the possibility for life.
Complex Organic Matter Discovered Created by Stars Throughout the Universe
Physicists Freeman Dyson has said that it appears as though the Universe was anticipating our existence. A recent discovery seems to support his observation: In 2011, astronomers discovered that organic compounds of unexpected complexity exist throughout the Universe, suggesting that complex organic compounds are not the sole domain of life but can be made naturally by stars.
Most interestingly, this organic star dust is similar in structure to complex organic compounds found in meteorites. Since meteorites are remnants of the early Solar System, the findings raise the possibility that stars enriched the early Solar System with organic compounds. The early Earth was subjected to severe bombardments by comets and asteroids, which potentially could have carried organic star dust.
This complex organic matter exists in vast molecular clouds in space, such as nebulae.http://en.wikipedia....Molecular_cloud
4 Life should not be fragile, but rather robust and able to thrive in extremely harsh environments
Found: A Batch of DNA Molecules That Seem To Have Originated in Space
This is big news, of course, because if the ingredients for life were brought here from some external source, there’s always the possibility that the same thing has happened elsewhere in the universe--possibly many times over.
NASA Researchers: DNA Building Blocks Can Be Made in Space
"People have been discovering components of DNA in meteorites since the 1960's, but researchers were unsure whether they were really created in space or if instead they came from contamination by terrestrial life," said Dr. Michael Callahan of NASA's Goddard Space Flight Center, Greenbelt, Md.
"For the first time, we have three lines of evidence that together give us confidence these DNA building blocks actually were created in space." Callahan is lead author of a paper on the discovery appearing in Proceedings of the National Academy of Sciences of the United States of America.
Possible Key to Life's Chemistry Revealed in 50 Year Old Experiment
"(Early life) didn't care if that amino acid was formed in space or a lightning strike in Earth's atmosphere or came out of a hydrothermal vent… So in the end, it is possible life got started from acquiring building blocks from a wide variety of sources."
"At some level, the universe seems to be hard-wired to create amino acids, provided you have the right elements present and energy," (Scott Sandford, a research scientist at NASA's Ames Research Center in California) said.
A breakdown of this wealth of evidence
Methanogens are unique among organisms in their ability to survive a wide range of temperatures, from the freezing point of water to 185 degrees Fahrenheit and everything in between.
Some of these hardy organisms also live in oxygen-starved environments, without sunlight or carbon, and scientists believe that studying these microbes could reveal the boundaries of extreme environments that support life here on Earth and on other planets.
The National Science Foundation (NSF) supported an extremophile sampling expedition to Loihi in 1999. Microbial mats, including a never before seen jelly-like organism surrounding the 160°C vents were collected for incubation and study at the Marine Bioproducts Engineering Center.
Odds of Alien Life on Newly Spotted Exoplanet Are "100 Percent" Says Its Discoverer
Steven Vogt, a professor of astronomy and astrophysics at UC Santa Cruz, said he had "almost no doubt" (which seems slightly different than 100 percent sure) that life exists on Gliese 581g, an exoplanet Vogt and colleagues discovered via the Keck Observatory that is orbiting in the "habitable zone" surrounding the red dwarf Gliese 581.
Vogt's statement might make for a bold prediction -- especially given the number of life-bearing planets we've found thus far -- but his statement is more an endorsement for the persistence of life than a declaration that he's found it elsewhere in the galaxy. "Personally, given the ubiquity and propensity of life to flourish wherever it can, I would say, my own personal feeling is that the chances of life on this planet are 100 percent," Vogt said to reporters.
1: Complex organic matter is made in space, and drifts in clouds in stellar nurseries.
2: DNA and amino acids are created in comets and asteroids.
3: Amino acids can also be created with the basic chemicals and conditions found on newly formed planets in varied ways.
4: The ingredients that we know are needed for life are abundant and widespread throughout the Universe.
5: The number of Earth-like planets for life to take root on or in is a fittingly astronomical number, on the order of tens of billions.
6: Life is not fragile, and is often found to exist in conditions that were once thought impossible.
7: Life doesn't have many requirements to exist, and those few requirements are met with abundance in the Universe.
8: As some of the scientists quoted have stated, it seems that the conditions and processes of the Universe are configured in a way that naturally creates life in abundance, just as it is configured in a way that naturally creates stars and planets in an abundance.
Our galaxy is thought to be around 13 billion years old. Life evolved on Earth around 3.5 billion years ago. Humans have evolved only within the last 7 million years, (150,000-200,000 years for homo-sapiens). Life in the galaxy has (and has had) time on it's side.
No one piece of this evidence is decisive, and taken as a whole it is not even decisive to the degree needed for a scientific proof. However, given this collection of evidence, it is very difficult to hold a reasonable doubt as to the existence of alien life.