Archive for Google

The Kilmainham Gaol Scam: yet another Reason not to use Google

Posted in History, Television with tags , , , on January 23, 2026 by telescoper

Last night, while I was waiting for Derry Girls to come on, I watched a part of Prime Time on RTÉ, a segment about how many people intending to visit Kilmainham Gaol Museum in Dublin had bought tickets online only to find out they had been scammed and the tickets weren’t valid. Worse, having entered their credit card details into a phoney website they then either lost further money or had to cancel their compromised cards. You can read more about this scandal here.

A major part of the success of this scam is that Google search highlighted the fake sites – several of them – by ranking them above the official site in search results All you need to do to get your site promoted in this way is to pay money to Google. Although Google had been informed about this con, at least some of the sites concerned were still up and running when the programme went out last night. It seems to me that Google was and is a party to this fraudulent activity, but it’s unlikely to be prosecuted, presumably for the same reason that nobody is prosecuting X/Grok for its illegal production and distribution of child pornography: the Irish State is deep in the pockets of Big Tech and won’t stand up to it whatever crimes it commits.

Anyway, I have some recommendations. First, don’t use Google search. Second, if you do use Google search, then at least disable “sponsored” searches as these include fraudulent sites. There are various ways to do this but they depend on your browser and OS so you will have to find out. Finally, no tickets to Kilmainham Gaol are available from any third-party providers, so use the official site. The front page should look like this:

If it doesn’t look like that then you have landed in the wrong place and should leave.

Please don’t let this put you off visiting Kilmainham Gaol Museum. It’s an important part of Ireland’s story. It was, for example, where the leaders of the 1916 Easter Rising were executed by firing squad. It is very busy, though, so you will almost certainly have to buy tickets in advance; a small number are released each morning but they go very quickly.

Black Holes, Hawking Radiation (and AI…)

Posted in Artificial Intelligence, The Universe and Stuff with tags , , , , , on December 7, 2025 by telescoper

It seems to be a common misapprehension that the energy released by the supermassive black holes in, for example, active galactic nuclei is in the form of Hawking radiation. It isn’t. Hawking radiation is only significant for black holes of very low mass. The radiation produced around supermassive black holes is due to the extremely high density and temperate of matter falling into the black hole through an accretion disk not due to the evaporation of the black hole itself. Hawking radiation has never been experimentally detected.

Hawking showed that the a black hole will produce black-body radiation with a temperature, the Hawking Temperature, given by TH in a beautiful formula below that brings together constants relating to gravity, statistical mechanics, quantum theory and relativity:

You can see that the Hawking Temperature is inversely proportional to the mass of the black hole M so is largest for very small black holes. In fact for a black hole with mass of order that of the Moon, the Hawking Temperature is just 3 Kelvin. Since the Universe is bathed in cosmic radiation with this temperature, such a black hole would not evaporate at all because it would absorb as much radiation as it emits by the Hawking mechanism as would any black hole of mass greater than this. The Hawking temperature for a supermassive black hole is many orders of magnitude lower than this, so Hawking radiation is completely irrelevant.

Notice that if a black hole does start to evaporate then its mass begins to decrease. Its Hawking temperature therefore increases so its mass decreases even more quickly. In the end the mass gets so low and the temperature so high that the black hole effectively explodes. Nobody really knows how to describe the final stage as it relies on physics we don’t understand.

Anyway, this all reminds that years ago I set an examination question that involved applying the Hawking formula above to calculate the lifetime of a black hole of mass M. It’s not too hard to show that it scales as M-3. Another part of the question asked: what is the mass of a black hole whose Hawking Temperature is room temperature (say 300 K), what would be the Schwarzschild radius of such a black hole, and what would be its lifetime?

I’ll leave it to my readers to plug the numbers into the Hawking formula above to derive the mass, etc. Please submit your answers through the comments box below. The first correct entry does not win a prize, not even a joke Peace Prize.

For a laugh I asked Google for the answer. Here is the AI summary:

Bonus marks for pointing out everything that’s wrong in this summary.

A Google Remedy

Posted in Uncategorized with tags , , on January 8, 2025 by telescoper

A few days ago I posted an article moaning about the enshittification of Google Search. Usually posting a piece like that achieves nothing except letting off a bit of steam. This time, however, one of the comments suggested a way to decrapify Google Search. Thanks to Andy Newsam for the tip.

The remedy is udm14.com:

If you click on udm14.com you will find out more about this useful site including how to share it. It doesn’t solve all the problems with Google, which are many and various, but it’s a start…