We used to have a tail on the back... and now it moves forward.
The Tail's Journey
Categories
Explanation
Experiment
Explain Bear
Listen up, smarty-pants! The "tail" moving forward refers to the tailbone, or coccyx, at the end of the spine. Humans used to have tails, but now it's just a lil' nub. You probably didn't know that 'cause you're so busy pickin' your nose!