The lying dashboard (part 2)

Following-on from my suspicions as to the accuracy of my car’s reporting of my travel statistics, here’s another mystery. The length of my journey from home to work, as recorded by my odometer this morning, was 24.7 km.  The length as recorded by Google Maps is 25.2 km.  So, my odometer underreads. Or it did […]

Continue reading

Quantum cryptography

I was reading last week a children’s book about “Secret codes”.  You probably know the kind of thing I’m talking about – substituting one letter for another, or a squiggly shape for a letter, rearranging letters, and so on. Fun things to do, but not the basis of modern cryptography. However, the book didn’t just […]

Continue reading

The bed of nails

It’s always fun to see this demonstrated. Here’s Haggis Henderson, at the recent NZ Institute of Physics conference in Christchurch, not only lying on a bed of nails but having a teenager stand on him too. He survived the experience, though I can’t vouch for what his back looked like afterwards. The bed of nails […]

Continue reading

Where will cyclone Oma go?

Cyclone Oma has ground to a halt between Vanuatu and New Caledonia. That’s not to say the cyclone has fizzled out – rather I mean it’s not changing its location very fast. But that’s may be about to change. But where will it go now? I note that there is a large discrepancy between where […]

Continue reading

Alice the camel

As we drove on a family outing at the weekend, we sung “Alice the camel”.   For those who don’t know it, it goes like this (to the tune of “Dem Bones”): “Alice the camel had five humps; Alice the camel had five humps; Alice the camel had five humps; so go, Alice go! Alice the […]

Continue reading