The matter of the lost dark matter

Dark matter might be found in hornets’ nests and cans of worms but not necessarily in the real world of cosmology and science. I recently reported on the work of Christian Moni Bidin which reveals serious discrepancies in science’s claims for the existence of dark matter. Of course, such observations would inevitably draw criticism and a recent blog post highlights these as well as pointing to another preprint that contradicts the work.

It has always struck me that dark matter, and indeed, dark energy are kludge factors to shoehorn observations into current theories. They allude not to mysterious, invisible forces, but to gaps in our understanding, surely. As Feynman once said: “It doesn’t matter how beautiful your theory is, it doesn’t matter how smart you are. If it doesn’t agree with experiment, it’s wrong.”

With that thought in mind, I asked Moni-Bidin to comment on the blog post. This is what he had to say:

“The blogger writes: ‘In my earlier post I remarked that this study makes a number of questionable assumptions about the shape of the Milky Way Halo – they take it to be smooth and spherical’. This is a bad misunderstanding of my work,” Moni-Bidin says, “which I found often reported in other sites also. My measurement of the mass density does not require any assumption about the shape of the Halo, spherical, flat, cubic or whatsoever. Contrary to previous works, it is model-independent. Then, I compare the results with the predictions of spherical halos, but simply because it is the most favourable case for the dark matter models, a prolate halo giving trouble to the theory itself, and an oblate halo being in larger discrepancy with the results. Moreover, I did not create those models. Had the specialists theorized that the dark halo was triangular, I would have compared with triangular models, it’s not a choice of mine.”

He comments more generally about the very common criticism that “the results rely on too many assumptions and some should be wrong”. “Maybe,” he says. “But, I share my assumptions with all previous literature (which is celebrated as detecting much dark matter). Simply, they are so basic that many works did not even mention them, but you can see that they are inside any formulation. The difference is that previous work assumed them plus other strong simplifying hypothesis, which I could release because today we have large databases available that once were prohibitive. But this is what we call science: when you match the models, the assumptions are OK, when not, the same assumptions must be wrong.”

It will be interesting to see the outpouring of hornets as the papers wend their way through the refereeing process. I will keep you informed.

A QR code for emergencies

Lifesquare is offering users in Marin County, California, a simple way to embed their essential health information, blood group, GP’s name and address, next of kin, medications, allergies, pre-existing conditions, etc into a QR code that emergency responders could scan at the scene of an incident or accident to ensure they don’t dose you up with any meds you shouldn’t have.

I assume you’re meant to print it off and put it in your wallet or purse, but you could have the QR code tattooed on to the back of your hand, forehead or some other prominent place. No, seriously, is the modern equivalent of the SOS Talisman from off of 1970s TV.

To be honest, you could set this up to point to a page on your website or a hosted page (in your DropBox folder or elsewhere) with your health details without using Lifesquare and particularly if you’re not in Marin County. There are countless QR code generators out there. You could also include your organ donor status in your QR code as well as information on any special wishes you have regarding your treatment should you not regain consciousness after an incident.

Lycopene and cancer prevention

Over the years there has been a lot of tomato talk, about how lycopene, the red pigment found in this fruit (yes, it’s definitely a fruit, it’s got seeds), could ward off cancer, specifically prostate cancer. It has also been linked to protecting us from cardiovascular disease, per the common discussions about the so-called Mediterranean diet. It is not a panacea and tests and trials have been small-scale. Nevertheless, as with the likes of that other infamous compound, resveratrol found in red wine, researchers are keen to demonstrate a link with their particular natural chemical and disease prevention.

In the first June issue of SpectroscopyNOW I discuss tests on lycopene extracted from tomatoes that seem to show it offers a certain level of protection against liver cancer triggered by nitrosamines, in lab mice at least. Ashwani Koul and his colleagues at Panjab University in Chandigarh, India, have been doing the research with interesting results. I asked Koul about the impetus:

“Since time immemorial, the tomato has formed an integral component of food, both traditional and western form,” he told Sciencebase. “It is used widely as a vegetable and is abundantly used in the preparation of sauces, curry, soup etc. throughout the world. Epidemiological studies indicate that populations consuming high amounts of vegetables including tomato, in their diet have a reduced incidence of several types of cancer.” So that’s the start of it…

“Over the years, lycopene, a nutrient found in tomatoes, has drawn much attraction for its ability to combat several chronic diseases including cancer,” he adds. “Moreover, lycopene being a component of major dietary source (tomato) finds acceptance with the population and its use is also not restricted as is the case with synthetic chemopreventive agents.” Indeed, lycopene is already marketed as a supplement, although specific health claims are not permitted under FDA rules for supplements without additional regulatory approval.

“With the studies planned and in progress we intend to determine the optimum levels of lycopene as a cancer chemopreventive agent, so as to tap its maximum potential,” Koul told me. “Further, we aim to investigate the detailed underlying mechanism of its cancer chemopreventive potential. Such studies would scientifically validate the anticancer abilities of phytonutrients present in vegetables including lycopene.”

You can read the full story on SpectroscopyNOW.

Tomato photo via CC on flickr.

Are diamondoids forever too?

Adamantane, the invincible molecule, was discovered in petroleum in 1933 and stimulated a whole new field in chemistry, that of research into polyhedral organic compounds. It might be thought of as the tiniest possible building block of diamond, which is after all an infinite 3D network of carbon atoms essentially pinned on the adamantane structure minus the hydrogens. Adamantane itself has been modified for practical applications in the pharmaceutical industry, in polymer science for heat-stable lubricants and others uses, and as molecular building blocks in nanotechnology. But, this “diamondoid” and its chemical cousins might also be the molecular mavens we need to guide hydrocarbon exploration.

Underground fossil fuel reservoirs including natural gas, gas condensate, petroleum and coal are the natural resources of hydrocarbons we rely on the most and commonly contain diamondoid hydrocarbons, says Patricia Lopes Barros de Araujo of the Federal Rural University of Pernambuco in Brazil, Ali Mansoori of the University of Illinois, USA and Elmo Silvano de Araujo of the Federal University of Pernambuco also in Brazil, who have reviewed the state of the art recently in the journal IJOGCT (full reference below).

Fundamentally, the team explains, diamondoids can act as geochemical tools for petroleum characterisation, their presence on fossil fuel fluids also gives researchers a way to evaluate petroleum sample quality, to determine its origin, investigate the degree of biodegradation and thermal maturity and event to help find and assess new sources of petroleum. “The presence of diamondoids in petroleum has become much more than a chemical curiosity,” they explain.

Research Blogging IconPatricia Lopes Barros de Araujo, Elmo Silvano de Araujo, & Ali Mansoori (2012). Diamondoids: occurrence in fossil fuels, applications in petroleum exploration and fouling in petroleum production. A review paper Int. J. Oil, Gas and Coal Technology, 5 (4), 316-367

Venus in transit

According to good friend of this blog Stuart Clark, writing in The Guardian, the 1761 transit of Venus was a watershed moment in the history of astronomy. It was, he says, the first time astronomers would have the opportunity to measure accurately the size of the solar system. The distance between the Earth and the Sun had been estimated, with varying degrees of success, since the Greeks, but this was different…the endeavour was the 18th century equivalent of the Large Hadron Collider. It was the first global scientific collaboration and took place in the midst and despite a global war at the time.

“The combined results from all the various missions were within about 4% of the modern accepted value of 150 million kilometres). At the next pair of transits, in 1874 and 1882, the accuracy was improved to 1%,” says Clark.

A transit of Venus across the Sun takes place when the planet Venus passes directly between the Sun and Earth. The “star” (actually a planet, obviously) seems to turn black against the solar disk (we’re simply seeing the side of the planet facing directly away from the sun and it is obviously not illuminated.

A transit lasts mere hours (the transit of 2004 lasted 6h). A transit is similar to a solar eclipse by the Moon. While the diameter of Venus is almost four times that of the Moon, Venus appears smaller, and travels more slowly across the face of the Sun, because it is much farther away from Earth.

The next transit of Venus will occur on 5 and 6 June 2012, and will be the last Venus transit this century; they come in pairs the previous one of the pair being on 8 June 2004. (Before that December 1874 and December 1882). The next pair of transits will not be until December 2117 and December 2125…so we’ve got a while to wait after Tuesday.

Bee pollen with a sting in the tail

There are millions of supplements on the market, most are untested in any clinical setting and are beyond pharma regulations. They’re available over-the-counter, without a prescription and may be contaminated with toxins, heavy metals and other nasties, especially those bought from far-flung places via the Internet. Some may be marginally useful in helping people recover from certain conditions although there is a dearth of evidence that any really do anything at all. Sometimes they can lead to adverse reactions including anaphylaxis and interfering with liver enzymes leading to problems with other products, including blocking prescription drugs or leading to metabolites staying in the bloodstream too long, with potential for heart, kidney, liver and other organ damage..

Among the long-list of spurious supplements is bee pollen (also known as bee bread, or ambrosia). The raw material taken from hives will contain countless microscopic fungi and bacteria. According to Science-based medicine, the claims made for bee pollen supplements are over-hyped and evidence-free, as is typical of this poorly regulated industry. E.g.

“The benefits are enormous and the substance has been proven by many health experts. This particular substance is known as an effective immune booster and one of the best ways to achieve a sound nutritional regime…The pollen from the bee has been proven to increase sexual functions in both men and women. It stimulates our organs, as well as our glands and is known to improve the natural increase on a person’s lifespan.”

All unproven hype with a total lack of any peer-reviewed references in decent journals reporting efficacy or tests. People often turn to such products because they believe them to be “natural” and somehow safer. Is it really natural to harvest products from bees, it’s no more or less natural than milking cows, I suppose, but natural does not mean safe and it certainly doesn’t mean efficacious. Strychnine and snake venom are both natural…but…

There are specific reports of severe allergic reactions to bee pollen products. Given that there is no evidence that they work but certain evidence that they can cause harm, if I were you, I’d steer clear of this particular sting.

Homeopathy Plus? Minus!

‘”There is no argument against homeopathy which stands up to scientific scrutiny. They are simply slogans, distortions and downright lies” says the HMC21 organisation.’

Hmmm. Homeopathic activists are getting vexed and waving banners and signing petitions it seems…

Well…science does not need to make “arguments” against homeopathy. Homeopathy needs to prove that its treatments work. The burden of proof is on those who make the claims for its efficacy not on those who understand the chemistry of water.

I’d like to see the trials, the data, the evidence, that demonstrate a prophylactic effect against malaria or HIV, say, before they start shouting about scientific scrutiny. I don’t care if the worried well want to waste their money on sugar pills to deal with their anxiety and neuroses and to claim back their me time. When homeopaths advise against taking functional anti-malaria medication in preference for a bottle of water with a wacky name that’s a different matter as it is potentially lethal pseudoscience that could affect many more people than the “patient”.

Do these people not imagine that the pharmaceutical industry would jump on homeopathy and sell it at a profit just the same if it wasn’t simply infinitely dilute preparations. Where is there any evidence at all that “like cures like” or that diluting anything makes it stronger?

Forget Fukushima, it’s the smokes that’ll nuke you

Tobacco firms have failed to act on radioactivity in cigarettes. According to cancer researchers:

“Cigarettes deliver dangerously concentrated doses of radioactivity directly into the lungs. When smokers inhale, the radioactive particles damage lung tissue, creating ‘hot spots’ of damage.

They add that:

“Other [toxic] chemicals in cigarette smoke damage the lung’s cleaning systems, which would normally get rid of gunk in our airways. So the particles build up over time. These localised build-ups lead to far greater and longer exposures to radiation than people would usually get from natural sources.”

So, why hasn’t the industry been pushed to do anything about this, well you know why…money.

All the water on Earth

We’ve all seen the graphic, now here comes a video to show all the water on Earth, the drop that is the freshwater and the droplet that is the available fresh water. And to think it could all be evaporated in an instant by a burst of energy from an exploding star or more tangibly we could simply carry on pouring it down the drain while people die of thirst.

David Bradley Music

TL:DR – I have dozens of songs and instrumentals for you to download or stream through my BandCamp page right now.


Although, I’m probably best known as a professional science writer and an amateur wildlife photographer, when I’m not involved in those you might catch me singing and playing live with my band, C5 Website/Facebook, or in our community a choir (TyrannoChorus).

Dave Bradley with a guitar in between songs at a pub gig with his band C5
Dave Bradley performing with C5 the band, photo by Clive Thomson. That’s lead guitarist Rich Blakesley blurred in the background.

You can hear my latest solo and collaborative recorded music on BandCamp and SoundCloud. Some of my stuff is on Spotify and iTunes too, including a few cover songs. As of 30th July 2023, Mrs Sciencebase and myself are also now veterans of the Cambridge Folk Festival having performed there live with a scratch choir organised and rehearsed by Ben and Dom.

My latest musical venture involved launching a Cottenham Jam with fellow musos at our local pub, this was almost 13 years after I co-founded the Cottenham Arts Night with Simon O, Adrian H, and Adrian I.

I’ve always been in love with music, since my first baby rattle and toy guitar as a tot, been attempting to play guitar ever since. It is only in the last fifteen years or so that I have performed live in front of audiences and written and recorded my music, first with a community choir and then in a gigging band C5. I’ve sang at the Royal Albert Hall with a mass choir and recorded at Abbey Road Studios, ditto. Have also sung with The London Community Gospel Choir (twice) and with Pete Churchill’s London Vocal Project (twice). I’ve also taken part in a couple of choral workshops with classical composer John Rutter.

I’m proud to have played quite a few pubs, events, festivals, and party gigs with my band C5 and also alongside the inimitable Barbara D and others. I’ve also been guitar and assistant musical director to Barbara in the CTW pit band. We’ve both now stepped back from our roles with CTW, me after ten years, although in 2025 I am taking on a new role with the CTW for this year’s Christmas role.

I am also proud to have had a few solo slots in front of audiences of a fair few hundred singing the lead on Billy Joel’s “The Longest Time” with the TyrannoChorus choir (led by Siobhan Lihoreau, with arranger and pianist Tim Lihoreau) at the West Road Concert Hall in Cambridge. I also sang the solo on “Be the Man” by The Young’uns for two charity events with the choir just before the 2020 lockdown. I’ve also occasionally provided guitar accompaniment on songs we have done by Cat Stevens, Sting, Paul Weller, The Who, The Divine Comedy, The Traveling Wilburys, The Beatles, and others.

This is a very short list of some of the musicians, bands, and artists I admire in alphabetical order: Alan Parsons Project, Athlete, B52s, Badly Drawn Boy, The Beach Boys, The Beatles, Blondie, Blue Aeroplanes, Blur, David Bowie, Kate Bush, Camel, Glen Campbell, Phil Collins, Crowded House, The Cure, Paco de Lucia, John Denver, Al Di Meola, Thomas Dolby, Doves, Dr Dre, Duran Duran, Editors, Elbow, Fred’s House, Robert Fripp, Peter Gabriel, Genesis, Steve Hackett, Steve Hillage, Carole King, King Crimson, The Kinks, Led Zeppelin, Manic Street Preachers, Joni Mitchell, Van Morrison, Mike Oldfield, Pavlov’s Dog, Placebo, Porcupine Tree, Radiohead, Gerry Rafferty, R.E.M, Nile Rodgers, Rush, Seals & Crofts, Siouxsie and The Banshees, Squeeze, Steely Dan, Supertramp, Andy Summers, Talking Heads, James Taylor, Tears for Fears, U2, Franki Valli, The Willows, Yes, Neil Young, there are many others, it’s hard to think of them off the top of your head.

I’ve been told that I occasionally sound like a Geordie Glenn Tilbrook (that’s according to Dek “Mono Stone” Ham), and sometimes George Harrison, Steely Dan, Stephen Duffy, Peter Gabriel, early Oasis, Phil Collins, Alan Parsons Project, Sting, James Taylor, David Bowie (most often, admittedly), and Stephen Stills, and most recently, Cat Stevens and Neil Finn (Crowded House) on the basis of my charity single “Bridges crossed and burned“.

I couldn’t claim to have even an ounce of the talent of those people, but I do reckon I’ve finally developed my own sound now. And, more to the point, I don’t wear my influences quite so prominently on my silk kimono sleeves as with many of my earlier songs, although there are almost always allusions to many of those inspirational musicians in there some where. I also get the feeling that if they’re commenting, then the singers they suggest I sound a bit like just happen to be ones they listen to the most.

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