In early December 2018 the physicists' blogosphere went berserk because of a 2017 paper (in fact still a preprint to this date: arXiv:1712.07962) in which the author James Farnes, University of Oxford, tries to explain Dark Matter and Dark Energy with a seemingly preposterous hypothesis: the presence of a negative-mass fluid that permeates the Universe. … Continue reading When Your Gravity Fails and Negativity Don’t Pull You Through: The Case for Negative-Mass Dark Matter
Quantum of what? Physicists have been wrestling for more than a century with quantum mechanics, a set of rules that govern the behaviour of atoms and other small systems - small compared to a human being. As a matter of fact, even what quantum mechanics is about is not so obvious: first, because if everything … Continue reading Spooky Computers at CERN
Le teorie popolari, si sa, spopolano laddove quelle scientifiche non arrivano. E' soprattutto la zona grigia - dove qualcosa tutto sommato abbiamo capito, ma non tutto tutto - dove si avventurano molti non esperti, che cercano di dare una spiegazione plausibile all'origine di fenomeni naturali catastrofici ma purtroppo difficilmente prevedibili come ad esempio un tempo … Continue reading Aria di Terremoto?
Quando ero bambino trascorrevo interminabili pomeriggi nel paese dove abitava una delle mie nonne. Specialmente durante l’inverno, poco interessato ai risultati delle partite di Serie A e attanagliato dalla noia, mi capitava di guardare dalla finestra le luci provenienti da un altro piccolo centro abitato, abbarbicato sulla cima della collina di fronte. Le luci delle … Continue reading La Teoria della Relatività: Generale, Ristretta, Speciale o meglio Locale
Less is more Less stuff, less waste. It's as simple as that. In fact, some people are actively advocating what's sometimes called "happy degrowth", i.e. embracing a new kind of global economy based on an ecological paradigm and essentially rejecting capitalist ideas. Degrowthers believe we need to shift to a more modest lifestyle as … Continue reading Virtual Reality will solve our problem with Global Warming. Or maybe not.
Recently, I have read a very recommended book called "The Interstellar Age: Inside the Forty-Year Voyager Mission" by Jim Bell (see its Goodreads entry). The book, as you can imagine from the title, recounts the story (so far) of the two Vogayer spacecrafts, and of the people who made this possible. There is also a … Continue reading Touring the Solar System
7:44am The sun is rising here in Toronto. He'll take a nap in the early afternoon between 1:10-3:40pm. The peak is expected around 2:30pm. Stay tuned for more updates! 8:55 We have to consider ourselves lucky we can see a solar eclipse at all. In fact, this phenomenon is not a direct consequence of any profound … Continue reading Live Blogging: Solar Eclipse 2017