In a small shop in Tehran's Grand Bazaar, Mohammed Rafi sells coloured pencils. He has no less than 50,000 of them crammed ...
How Many Pencils Can Be Made Out of a Factory Batch of Graphite? A batch of graphite has just been delivered to this pencil factory in Germany. Once it’s been thoroughly mixed with clay, it’s ...
W hen I was in 4th grade, I somehow accidentally stabbed the palm of my hand with a pencil. It wasn’t a horrific incident but it was stuck in there pretty good. Decades later, I realized there ...