Prospectors hunting for gold in the U.S. threw tons of rocks like this one aside, but now they’re in demand.
http://news.yahoo.com/gold-rush-era-discards-could-fuel-cellphones-tvs-133752521.html
It seems what was waste (trash) yesterday, is going to be breakthrough groundbreaking asset for technology tomorrow. Very interesting. I wonder how many other things willbe like this.