This piece of information was forwarded to me by a friend (Thanks Y!) ... Amazing!
The yellow bubbly substance is actually yeast (levadura) used to make lager in Europe (mmm... anyone knows what lager is???????) which had been thought to be original from there... But they have found its origin being down South in OUR PATAGONIA, and not in Europe!!!
To find out further, please click on the image and read the article... Comments are welcomed!!