Taking pleasure in finding something new (Image: Courtesy of Jon Richfield)
Jon Richfield has answered so many Last Word questions that readers think New Scientist must have made him up. We talk to the man behind the name
Your tally is 150-plus published answers since 1996. How did it all start?
One of my earliest questions was about why it is harder to erase old pencil marks than new pencil ones. It just intrigued me.
So why is it harder to erase old pencil marks?
I suspected there were two effects at work. Pencil graphite contains wax, and while this…
