Sulfur in its purest form is yellow, brittle, and odorless. The common rotten egg smell actually comes from a compound called hydrogen sulfide. 

Sulfur is the 10th most abundant element by mass in the universe. 

Most sulfur deposits originate from volcanic activity. 

Sulfur bonds with almost all elements, with the notable exception of the noble gases. 

Traditionally, sulfur was called “brimstone,” and alchemists believed it was closely linked to fire and the soul. 

Sulfur is a key ingredient in gunpowder.

Sulfur is the main component of sulfuric acid, the most widely manufactured chemical in the world. 

Ancient Greeks and Romans used sulfur for fumigation and bleaching. 

Today, sulfur is more commonly obtained as a byproduct of fossil fuel processing. 

Certain bacteria use sulfate instead of oxygen for respiration. 

Jupiter’s moon Io is rich in yellow sulfur.