Would it surprise you to know that the periodic table, as we know it, isn’t the first table of elements? That even the order of the elements has changed from its original structure? Like many other things in life, the periodic table was not always as stable as it is today. In fact, we once believed that all things in the universe were made from just four “elements”–Earth, Fire, Water, and Air.
Modern society may have a more advanced understanding. But to philosophers like Plato and Aristotle (who lived around 300 BCE), the world (and everything in it) was believed to spring from these four things.