For the sake for this discussion it doesn't matter whether we believe Darwin or not, the fact is we are all here and every second we're alive our bodies do amazing things. All of these amazing things we too frequently take for granted. Like breathing or sweating for instance...we don't even think about it, they just happen. Doesn't it seem ironic that someone may spend hours trying to figure out how to beat a level of a video game or how to use a new tool, yet that same person may have never thought twice about what happens to their food after it passes through their esophagus. I don't expect everyone to have the knowledge of a surgeon, but maybe if the average American knew more about their body they could make better choices with their bodily health in mind.
I challenge you to learn something knew about your body every day. I bet you can't guess where 1/4 of all the bones in your body are....