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Ohioans measure a really big π

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Ohio State University mathematician Niles Johnson got in touch on Friday to tell us that our π Approximation Challenge last year had inspired him to hatch an audacious plan to measure a really big π.

The word ‘geometry’ is derived from the Greek for ‘measurement of land’, and Dr. Johnson took that quite literally: he wanted to measure the Great Circle Earthworks in Heath, Ohio; a part of the Newark Earthworks (not their original name) built over 2,000 years ago.

I bought isthisprime.com

probable prime

Around about exactly this time a year ago, I bought the frivolous domain name three.onefouronefivenine.com, to celebrate π Day and to indulge my curiosity about a marvellous algorithm to compute π’s digits.

This year, I’ve been thinking about prime numbers, and my hosting provider has run another sale on domain names. So, I’ve bought isthisprime.com. You can probably guess what I’ve made it do.

Maths Objects: polyhedra

Time for some more maths objects! This time I wanted to show you the various polyhedra I’ve got around my desk.

We’ve done a bit of Spring cleaning

It’s daylight outside at the moment, which hasn’t been the case for pretty much any of the past few months up here in the North-East of England. That means Spring is on its way, so my cleaning and tidying instinct has activated.

poppy on a chair

When I can’t think of anything else to put here, I’ll use a picture of Poppy, the Aperiodical Dog.

We’ve had the same layout here since 2013, I think, so it was high time it was freshened up. I’ve made a bright new header image, and I’ve banished the sidebar to the bottom of the page so there’s nothing to interrupt your reading of our very interesting articles.

Additionally, we’re always finding that we want to add extra bits of information or quips, with nowhere sensible to put them. Parenthetical statements ruin the flow of reading if they’re too long, and footnotes don’t really work on the web. You’ll have noticed there’s quite a bit of space on the right (unless you’re reading this on your phone) – that’s set aside so we can put whatever little notes, links, or images we think would be worthwhile, without getting in the way of the main text.

So, I hope you like it, and please let us know if anything’s broken in the comments.