How about this one: Did you know that Earth Day has its own theme song? If you can name it, you're a true Earth Day fan. Otherwise, read on to find out what it is along with other fun facts about ...

As we ease into 2019, here are 19 interesting facts about the number 19: 1. 19 is the eighth prime number, a number that can only be divided by one and itself ... you didn't know about the ...