Physics news

Gravity - Newton and Einstein

At https://phys.org/print456129421.html ... astronomers and physicists have revived a previously debunked theory of gravity, arguing that motion within dwarf galaxies would be slower if they were close to a massive galaxy. This is the Modified Newtonian Dynamics (or MOND as it is usually referred to) - which proved to be a controversial alternative to Einstein's General Relativity model. Modern attempts to keep general relativity alive have resorted to claiming dark matter plays a role - even if it cannot be detected.

Arrhenius

At https://chaamjamal.wordpress.com/2018/06/29/a-theory-of-ice-age-cycles/ ... an intriguing blog post by Chaam Jamal concerning some ideas by Gerald Marsh, a retired laboratory physicist who challenged mainstream views that ice age cycles were initiated by Milankovitch orbital cycles - and driven by the Arrhenius effect on carbon dioxide (co2). One can instantly see a problem - is the Arrhenius effect real (a hypothesis that has been subsumed into the mainstream narrative). The Arrhenius hypothesis goes back to 1896 (and before that we had Tyndal in 1861).

Validating Einstein

In Electric Universe circles we hear a lot about Einstein being wrong about this and that - and the failure of his theories (and the weakness of gravity and all that). At www.scientificamerican.com/article/einsteins-greatest-theory-validated-o... .... which is saying something quite opposite. Astrophysicist Tom Collett set out to disprove Einstein, he assures us, but instead found corroboration. He set up an experiment to test one aspect of Einstein's Theory of General Relativity (first published in 1915).

Misbehaving Neutrinos

Also sent in by Jovan - go to www.scientificamerican.com/article/evidence-builds-for-a-new-kind-of-neu... .... the article itself is available to read at the pre-porint arXiv server but the authors have presented it to an international conference in Heidelberg in Germany. We have muaon neutrinos and electron neutrinos but what are these new ones? However, a word of caution according to one souce. The researchers are not sure the flashes of light seen are really coming from neutrinos. It is possible some unknown process is producing an excess of photons that mimic the neutrino signal.

Standard Model of Particle Physics

At the link here the standard model of particle physics is discussed in an easy to understand manner - go to https://theconversation.com/the-standard-model-of-particle-physics-the-a... ... which begins, more than a quarter of Nobel Prizes in physics of the last century are direct inputs to or direct results of the Standard Model. We are told the standard model has predicted the results of experiment after experimentwhich includes the discovery of quarks and bosuns - as well as more famously, the Higgs Bosun.

Stephen Hawking Again

Jovan sent in the link http://blogs.discovermagazine.com/d-brief/2018/03/20/stephen-hawking-fin... ... what did Stephen Hawking's final paper say (and doesn't say). It was on the idea of the multi-verse - different universes within each other. This is bound up with another idea, eternal inflation. It continues to inflate forever - in most places. It can in some places actually stop - and where it stops a new universe forms (in a repeating process that has no end). You won't be much wiser after the reading the link.

Stephen Hawking

Lots of tributes to Stephen Hawking out there after his recent death, last week. He is well known for his work on black holes for example. In the link at https://phys.org/print440413851.html ... we are told black holes were the remnants of supermassive stars that had fallen in on themselves, contracting to such a small size that gravity became so strong even light cannot escape. Hawking filled in some of the holes in the theory. Why do black holes exist? Answer. Because gravity exists and the speed of light is not infinite.

Water in Diamonds

We now have evidence of water in diamonds - as an inclusion. This is said to be a pointer to water rich regions in the Mantle - see https://wattsupwiththat.com/2018/03/10/weird-stuff-type-vii-water-ice-fo... ... The study in the journal Science (March 8th 2018). Diamonds from South Africa, China, and Botswana, were used in the study. They are said to have surged up from the innards of the Earth - but later this is described as a theory. The diamonds were formed under intense heat and therefore the assumption of an inner earth origin.

Earth's Core

Go to https://phys.org/print437245752.html ... for the story. Basically, the mainstream view for a long time has been that Earth's inner core formed a billion years ago when a solid super hot iron nugget spontaneously began to crystalise inside a 4200 mile wide ball of liquid metal at the centre of the Earth. According to a new paper in Earth and Planetary Science Letters the above theory is a paradox - contradicting itself.

Minoans and Mycenaeans

At http://popular-archaeology.com/issue/summer-2017/article/ancient-dna-rev... ... It seems that DNA confirms that the people of Crete and the Greek mainland, including the Mycenaeans, are all closely related in origin with a strong genetic signal from early farmers in Anatolia. This puts to bed the idea the Minoans arrived in Crete from a more advanced civilisation elsewhere. The article in particular blows the Black Athena hypothesis out of the water (although I don't think it had a lot of traction in any case).