Category Archives: science

The SHIELD Helicarrier.

gnomishlich asks

Surely by now you’ve seen the Avengers, think of the SHIELD helicarrier? What is your opinion on a nuclear fuelled flying fortress? Feasible, possible, absurdly extravagant?

Well, there’s a few points to be made here, first and foremost of which is that the SHIELD helicarrier is not exactly an original concept. Gigantic flying aircraft carriers are a staple of science fiction and can be seen in everything ranging from Doctor Who to Sky Captain to Captain Scarlet. They’re a progression from the zeppelins and other airships that were common in the first half of the twentieth century, in the sense that I imagine people are thinking “Well, if we could do that with a glorified balloon then just think what we could do with jet engines!” The idea of a flying airbase isn’t a bad one in and of itself, and if you want proof I believe one of the things that was on the drawing board as part of the US military’s ever-expanding drone program was essentially a drone surveillance blimp that could stay aloft for weeks at a time and also serve as a refuelling station for other lightweight drone aircraft1.

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The Theory Of Theories.

Otherwise known as the scientific method, or How Science Works. You were probably taught the basics of this in secondary school/high school/your local equivalent, but the number of physics undergraduates who came through my university not having the first clue about how science works is large enough that I suspect it’s not quite being hammered into people’s brains the way it should be. Which is a shame1, because not knowing anything about the scientific method is what allows so much anti-science to flourish in the press and media at large. I guarantee you homeopathy – for example — wouldn’t last a second in a world where people were the least bit curious about what was going on under the bonnet, and neither would the hundreds of news “stories” about how chocolate is actually good for us.

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Quantum Erasure.

Oh no wait, erasers.

It’s at around this point that I start thinking “Why on earth did I decide to write something about the quantum eraser?” As if wavefunction collapse and wave-particle duality weren’t hard enough concepts to get your head around at the best of times, introducing the quantum eraser and quantum entanglement will probably make your brain implode completely. I know mine did, and still does every time I read about it. I make a lot of sacrifices for you guys, okay?

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Double Slit Trouble.

And so the blog finally drags on to the point where I have to start talking quantum again. Quantum mechanics is a hell of a thing; it’s both complex and hugely counterintuitive, and it isn’t helped by many of the popular misconceptions about it such as Schrodinger’s cat. I originally wanted to explain how quantum entanglement and the quantum eraser works because it’s one of the most head-screwy bits of physics out there, but then I realised there’s a lot of basic physics knowledge required to understand that that I can’t just take for granted. In particular you really have to know about wave-particle duality and the double slit experiment.

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Fast Breeder Reactors.

This article on fast breeder reactors is expertly timed to coincide with everyone forgetting what I said about regular nuclear reactors a couple of months back.

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Probe Landings.

The Curiosity rover landed on Mars a few weeks back. To do this it went through a complicated atmospheric entry procedure to slow down from orbital velocity before deploying a very large parachute capable of providing an effective drag force in the thin Martian atmosphere. Curiosity made it to the surface safely, and did so largely because it’s the beneficiary of about forty years of experience in successfully – and not so successfully – landing stuff on Mars. But probe landings were not always so refined.

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