Genesis 3 introduces us to a creature that we're not familiar with. Because of the passing of time, literally nobody is certain what they are.
It's the Cherubim.
There was a time we thought they were babies with wings. Read the article to know why!
What we know for certain is that "cherubim" is the plural of "cherub," and they are mentioned nearly 100 times in the Scriptures. However, I don't recall ever hearing a sermon including them. They seem wildly important, yet they're never talked about.
It's interesting.