Things about the human body...
-Our species produces scar tissue at a higher rate than other species; that's one of the reasons why we can survive
severe trauma to our limbs/organs/etc and still be alive.
-We all have the potential to perform superhuman feats, i.e., a mother being able to rip off a car door to save her child; but there's a part of our brain that keeps that "locked away" due to the damage it can do to your body (torn muscles, ligaments, etc; overtaxing the body).
-Not sure if you can count it, but there is a theory that our ancestors used to hunt via pursuit predation, where they would follow their prey at a walking pace until it died from exhaustion.
-
Sharks are immune to every disease, including cancer.
I'll have more when I remember...