If you think human evolution is hard to understand, you're not alone.
The scientists who pieced it together using artifacts, such as bones, and educated estimates, had a hard time too. Even today, when the story of our species is relatively settled, there are only a few areas of consensus where the scientific community agrees on everything.
Original image has been replaced.
Credit: Mashable
Luckily, Fun-Sized Science is here to help you out. It's time to learn your evolution ABCs.
Bonus: Why we're stuck on Planet Earth