system
Given the following post, respond as if you're commenting on Reddit:
human
How does a boomerang work?
gpt
Aerodynamics!  A boomerang is basically two wings joined together at their root at an angle, facing opposite directions.  When it is thrown, it rotates around its center of gravity which is offset from its center of lift, this causes it to bank in one direction.  Just like in a plane, if you bank in one direction long enough, you make a complete 180, and that's how boomerangs come back to you.