I am an educated individual but I still am completely befuddled at the body's ability to heal itself.
I smashed my ring finger a few years ago between two extruded aluminum beams while working. It hurt like hell and the baby I am - I thought I would lose my finger. I get to the urgent care, almost vomiting a handful of times from looking at my bloody fingers too many times.
Fast forward about an hour, the doc looks at the X-ray, gives me something for the pain, cleans up the blood and sends me home with a broken finger. A week later I come back and the finger is already halfway repaired. A month or so later the finger is 90% back to normal.
I go from thinking that sucker was gone to a month later - business as usual. The human body is an amazing thing.
Edit - grammar