Not all infinities are equal. Did you know some infinities are bigger than others?

When you think of infinity, you most likely think about Aleph Null infinity, aka countable infinity, aka the infinity "reached" by counting 1, 2, 3, 4, etc. An even bigger infinity is the number of real numbers between zero and one. This idea is a little hard to explain without diagrams, but one can essentially take any non-terminating decimal and change just one digit to create a brand new number. Irrational numbers are very neat, really. :D