Read this article:
By Laurence Knight and Tim Bowler, BBC News
We may no longer need to mine it, we can just keep recycling it!
Also, when I first moved to the UK, back in the day, I seriously looked up “aluminium” online to make sure that it was actually aluminum. And this was back in 1998, so the internet was slow and it took some work to be sure. Yup, just another hilarious altered spelling, like theatre and colour.
Also, How Stuff Works has a good page on the stuff.
I never even thought about this. I guess I just always called it the “division symbol”. But lo, and behold, in my abstract algebra class today, my instructor couldn’t remember it, but was sure that it had a name. Thanks to Wikipedia, I now know it.
Obelus, like obelisk, is Greek in origin, from obelos, meaning a sharpened stick, spit, or pointed pillar. The plural is obeli.
Merriam Webster indicates that the primary definition of obelus is the symbol being used to mark a questionable passage in an ancient manuscript.
Wikipedia describes this use in Aristarchus’ markings in the works of Homer, and in the editing of the Bible by modern editors.
Wolfram MathWorld explains that it is also used in typography to indicate a footnote‡, although in The Elements of Typographic Style, the author, Robert Bringhurst, indicates that the dagger symbol †,
†, can also be called an obelus in such a context (page 306). He also says that this division sign can be called an obelisk (page 314).
‡ Weisstein, Eric W. “Obelus.” From MathWorld–A Wolfram Web Resource. http://mathworld.wolfram.com/Obelus.html
The idea behind this blog is that I like to learn something new each day and perhaps so would others that I know. Furthermore, I don’t want to post all of this on Facebook. Rather, if you’re interested in what I’m learning, you may choose to check out these posts rather than have them thrown at you by Facebook’s algorithms. And if you don’t know me, now the things that interest me are available to you too! Many of the ‘something new’s will be random, and varied, I hope.