Evidence Definition and 367 Threads

Evidence of one of the largest explosive eruptions ever recorded in the Aegean Sea https://phys.org/news/2024-01-evidence-largest-explosive-eruptions-aegean.html https://www.nature.com/articles/s43247-023-01171-z I wonder it ranks against Tambora (1815) and Krakatoa (1883)...

I was wondering if the Foucault pendulum experience was an evidence that earth does rotate on itself.

A paper by Nhat-Minh Nguyen, Dragan Huterer, Yuewei Wen titled "Evidence for suppression of structure growth in the concordance cosmological model" https://arxiv.org/abs/2302.01331 The abstract says: We present evidence for a suppressed growth rate of large-scale structure during the...

It is said that CMBR indicates that dark matter is non-baryonic. How so?

We have much evidence of the existence of black holes in our universe ... so why does not the same occur in relation to white holes since they are also the result of the same theoretical prediction ?

Muons are a popular way to provide evidence for Special Relativity. But, does Muon Tomography provide evidence for SR? Can you calibrate your muon detectors without reference to SR? Is there any need to refer to SR when interpreting the data? I tutored a high school student who argued the...

I am new to this forum and in line with its rules I am trying not to repeat a question already asked. I find that Jeremyfiennes original question I.e Experimental evidence for effective mass increasing with speed” is the question I want to ask but I am not satisfied with the answers given so...

Cosmology and multiverse are beyond my limited knowledge, but I came across the following article that aroused my curiosity. Although I am extremely cautious with "exotic" theories, I'd like to read any comments on that part of the article that a model proposed by cosmologist Laura...

Unsurprisingly the Milky Way seems to have been studied a lot. We have really good luminous mass profiles (e.g. McMillan 2011) and increasingly accurate circular velocity observations for stars at various radiuses (e.g. Eilers 2019) meaning we can confidently infer dark matter models. So the...

The space expands due the dark energy, so the light wavelength also stretches during its journey between galaxies, causing a measurable redshift. How can I argue that this is the right reasoning for the measured redshift? What if someone states that the photon maybe simple loses its energy over...

[Moderator's note: Spin off from previous thread due to topic change.] It's my understanding that Edwin Hubble used the Hooker telescope to measure the red shift of galaxies only within the Local Group of galaxies to determine that the universe was expanding. As we see here...

Could the existence of the 9th planet of the solar system is possible under these arguments of existence of it some where in the out scurt of solar system? The evidence for Planet 9 comes from its gravitational pull on other bodies. If the planet exists, its gravity will affect the orbits of...

I am currently obsessed with futurism but I am terrified I will run out of novums to contemplate about. A novum is an idea like “FTL travel” or “Gene splicing”. I was wondering if their is any proof that their is an unlimited amount of ideas that humans can come up with. My uncle was reading...

I understand that it is one of Einstein's postulates, however I don't know of any direct experiments which show that it is true.

Hello everybody, I am working on a Python project in which I have to make Bayesian inference to estimate 4 or more parameters using MCMC. I also need to evaluate the evidence and I thought to do so through the Laplace approximation in n-dimensions: $$ E = P(x_0)2\pi^{n/2}|C|^{1/2} $$ Where C...

What is the best recent experimental evidence for effective mass increase (momentum/velocity) with speed, with experimental details? Searching the web all I find is either very old ones (early 1900s). Or vague generalized statements like (Wikipedia) "Many additional experiments concerning the...

Please help. Is those statement true or false? With some proofs

Pop Science reporting example above. The book "Extraterrestrial The first sign of intelligent life beyond Earth" Avi Loeb, has not yet been published. I put this in General Discussion, if someone thinks sound byte previews of a yet unpublished book warrant something different please report...

This paper appears to be a major break though in observational evidence of a strong equivalence principle violation, something predicted in MOND and contrary to general relativity. The analysis is model dependent, but it seems to rule out the most plausible conventional GR based alternatives...

Biorhythms have been "known" about for many decades There are 3 rhythms - 23, 28 and 33 day cycles - physical, emotional and mental respectively. biorhythms pic These must have been calculated using observation of human qualities and noting them down My question is - are there any external...

Hi All In discussing another issue it occurred to me the only experiential evidence I know that normal visible light is EM radiation is Faraday Rotation. I strongly suspect we have a lot more these days. Amusing story. Fermi's wife had a degree in general science that did not cover...

I read in this morning's newspaper, that we now have a test which was "found to be 100% accurate by experts". My personal crap detector pinged. (If you were not around in the 60's, just say I was sceptical.) Maybe they were not implying that the test IS 100% accurate, just that in their tests...

The accompanying table lists the numbers of Internet users per 100 people and numbers of scientific award winners per 10 million people for different countries. Construct a​ scatterplot, find the value of the linear correlation coefficient​ r, and find the​ P-value of r. Determine whether there...

I know Dr Fauci said that the virus might mutate by September and that we are likely to see another round of the virus then (if we have a reprieve in the summer). But I've been reading that they don't know if people that have had the virus are immune for weeks, or months. It's not very...

Has MESSENGER found evidence that Venus originally had a nitrogen atmosphere, and might have been more habitable, and the present amount of CO2 was released by some cataclysm afterwards? https://phys.org/news/2020-04-lucky-messenger-upends-long-held-idea.html

Publication: Constraint on the matter–antimatter symmetry-violating phase in neutrino oscillations Edit: arXiv: Constraint on the Matter-Antimatter Symmetry-Violating Phase in Neutrino Oscillations Article: Neutrino Asymmetry Passes Critical Threshold Previous measurements already hinted at...

I have searched the forum a bit but could not find a discussion of this Astrophysics letter: 'Evidence for anisotropy of cosmic acceleration', Jacques Colin et. al, 18 Oct 2019. Can someone please direct me to any forum discussion?

The concept of that when a photon's trajectory intersects with the Schwarzschild Radius/event horizon, said photon will never exit the Schwarzschild Radius/event horizon. Or any other object besides a photon for that matter. So far what has been the strongest evidence for this prediction?

I don't understand how observations of the universe and theories behind the cosmos support the Big Bang Theory. For example, the microwave background could be explained through different mechanisms in space. Couldn't the red shift in galaxies be explained by something that occurred in the...

Hello. My current understanding (please correct, if wrong) is that the expansion of the universe is observed to be accelerating, rather than coasting or slowing down. The tentative cause of this acceleration has been given the placeholder name of 'Dark Energy'. One line of evidence for this...

The reference in the summary refers to an article which has been recently accepted by The Astrophysical Journal. A draft version of the article dated December 10, 2019 is https://arxiv.org/pdf/1912.04903.pdf . The content of the draft article is way over my head, so I am hoping that...

I am curious about the historic experimental evidence that lead to Kirchhoff's radiation law. It is easy to take for granted the ubiquitous temperature/wavelength curve that lead Planck to the quantization concept. But I wondered historically how the curve was derived. To clarify, we...

No evidence for globally coherent warm and cold periods over the preindustrial Common Era This is being reported in the popular news, here's a link to the Nature abstract. https://www.nature.com/articles/s41586-019-1401-2

Hello. https://royalsocietypublishing.org/doi/pdf/10.1098/rspa.1970.0021 The Singularities of Gravitational Collapse and Cosmology The above paper by Hawking and Penrose is presented in the form of a mathematical proof. To my knowledge the predictions it makes about the initial cosmological...

Becker et al. 2019, Asymmetry and non-dispersivity in the Aharonov-Bohm effect The paper is open access and published in Nature Communications.

I am wondering what is the physical evidence that Cooper pairs are indeed the ones responsible for superconductivity. These pairs consist of two electrons with opposite momentum, forming a boson with null momentum. But what about pairs that would consist of, say, 6 electrons (or even more)? Of...

I don't think there is a thread on this? R Gusten et al, Nature, 2019, DOI: 10.1038/s41586-019-1090-x

Is there any evidence that objects moving increasingly closer to light speed gain gravitational mass, in the sense of attracting surrounding (and not co-moving) masses more strongly, rather than solely possessing the increased inertial mass implied by the greater force necessary to...

Hi, I thought I would come and ask here as something has been bugging me for quite a while. Exoplanets. I'm not being bugged by the fact we are looking for them or that they exist. I am a bit suspicious of some of the evidence and how it's interpreted. While the adage is "Extraordinary...

As stated in the question--is there any evidence of a non zero rate of change of the acceleration of the expansion of the universe. What is the evidence for it and is it negative or positive? Also if there is what would it take to determine if there was a jounce?

form a conclusion about statistical significance. Do not make any formal calculations. Either use the results provided or make subjective judgments about the results. a manufacturer of laptop computers claims that only 1% of their computers are defective. In a sample of 600 computers, it was...

Using the keywords "nutrition" and "cancer", the Internet spews out thousands of articles. Ignoring the supermarket-checkout-magazine type of article, the others tend to either (a) be debunking various myths or (b) advising to avoid carcinogenic substances or (c) recommending to have a healthy...

The second Randall-Sundrum model was based on a large as opposed to compactified dimension. Has the possible existence of large higher dimensions been eliminated and what evidence rules them out?

Are there any on the forum that think that what you experience is no evidence of reality? Or is it evidence? For example can you tell from your experience that reality is not one in whichno part experiences? Is that a simple truth that those on the forum agree upon, or are there those on the...

Bee Hossenfelder's blog has a discussion: http://backreaction.blogspot.com/ Preprint: https://arxiv.org/abs/1805.12028 New evidence in the search for the 'sterile' neutrino. Can someone comment on this please. @mfb

Homework Statement Homework Equations a = v/t p=mv(?) The Attempt at a Solution If an engine is turned on, that means that the ships are accelerating since the engine pushes back on air with a force and air pushes back to propel the ships forward, so I thought (A) would be the answer, even...

In conducting research into historical accounts of Earths magnetic field, I consistently come across proposals of stable planetary magnetic grid systems; many of these theories which have apparently been developed through much time and effort. While I am unaware of any theory that cannot be...

<< Mentor Note -- after a very long Mentor discussion, we acknowledge that this paper, while potentially controversial, has been published in a reputable peer-reviewed journal. We believe that a discussion of this paper can be useful and constructive. Thanks >> This paper of mine was...

Imagine that the CMB did not exist. What observational evidence exists to support the theory of the metric expansion of spacetime, as opposed to having a static spacetime and it's the matter distribution that is expanding - as it would in an explosion?

As the title states. There's been a flurry of research being done in Japan on a banned topic related to "LENR". I was wondering what is the burden of proof required to change minds on this topic? How or where may it be presented? Is the guiding principle that if it cannot be described by...