The number on a pencil indicates the amount of hardness or softness the writing core has. A #1 pencil is very soft, makes a dark mark, and tends to smudge. A #3 or #4 pencil is very hard, makes a light mark, and tends to “dent” the paper. The #2 grade pencil makes a...
The invention of scissors is frequently attributed to Leonardo DaVinci (maybe Mona Lisa just needed her hair cut?), but scissors were around long before DaVinci's time (1452-1519) and the actual person who invented scissors is not known. In 1500 BC Ancient Egyptians...