2. History
Graphite pencils are known
from the XVI century. There was
a strong storm that passed
through England in the
Cumberland area. Local
shepherds found in the exposed
earth kind of a dark mass which
they found charcoal but it was a
graphite.
Shepherds used graphite
to mark their sheep.
9. Space
The issue of writing in space is complicated for several reasons. The
absence of gravity makes the use of regular pens difficult since
most rely on a gravity-feed effect to make ink flow down to the nib.