A class of fifth-graders from Green Acres Elementary in Lebanon, Ore., asked us to find out how pencil lead is made. That quest took us all the way back to the dawn of the universe and then all the ...
A batch of graphite has just been delivered to this pencil factory in Germany. Once it’s been thoroughly mixed with clay, it’s ready to go into production, with around 550 pounds of the stuff making ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback