All the Discovered Gold in the World (in one chart)

Source - Visual Capitalist

The source of this graphic - Kalo Gold - appears to be a gold speculation company focusing on Fiji and British Columbia. I haven't the foggiest idea whether they're a reputable company or some sort of scammers' paradise.

I do know that I like their inforgraphic on where the gold in the world currently is - both above and underground.

Long term, I wonder when it'll become profitable to mine for gold in our landfills - especially the last few years' layers including electronic equipment.

The Untold Truth of Magic Eraser

I am not at all surprised that Magic Erasers aren't anything more than microporous, abrasive melamine.

I'm kind of impressed at the Mr Clean folks for figuring out a way to market a very plain material to us as being a 'magic' cleaning product (and for folks who make and buy cheaper versions).

I'm less impressed with The King of Random's successors and their stupid experiments with Magic Erasers or idiots polishing their teeth (seriously) with Magic Erasers.

I did wish there was a little more science explanation of the material, so I turned to the gaming community...as you do, of course.

Rare glass penny from World War II sells for $70K

Who knew?

I'd heard of the steel pennies from 1943. Heck I've had one somewhere along the way (though I've no idea where it is right now.)

But a glass penny, experimental or otherwise?

That's really cool.

During the war, copper was needed for ammunition. The U.S. Mint authorized tests that included making uncirculated pennies from other metals, plastic and rubber. The Blue Ridge Glass Co. in Tennessee made experimental pennies using tempered glass. (source)

The Composition of US Coins

Thanks, Compound Interest.

And thanks, ACS for working with Andy Brunning (of the aforementioned Compound Interest) to produce this great, visual guide to the metals in US coinage.

That non-pure copper penny can make for some great lab experiments.

Then again, so can the pure copper.