Celebrated annually on October 23 from 6:02 a.m. to 6:02 p.m., Mole Day commemorates "Avogadro's Number": 6.02 x 10 23. This number--called a mole--is a basic measuring unit in chemistry. Mole Day ...

The size and shape of the mole also matter. A big mole might have a bigger influence on you. The shape can tell us more too. A round mole might mean good luck, while a triangle might mean you'll ...