Read this article:
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.