On a table in the Saranac Art Gallery, which was displaying the work of late artist Leslie LePere from Feb. 7 to March 1, ...

The pencil “lead” is actually a mixture of graphite and clay. More clay in the mixture makes the lead harder. A harder lead has a higher number. Pencils are numbered from 1-3 but most people use a ...

Now, in a recent study, researchers from Japan found a simple and low-cost way of tuning the reflectance spectra of pencil ...

After all, they are both composed entirely of carbon atoms. The main difference between pencil lead and the sparkling gem, which are allotypes (different forms) of carbon atoms, lies in how these ...