While we humans get concussions pretty easily, bighorn sheep slam their heads into each other all the time without ill affects. How is this possible?
As we all learned in health class, human beings have 32 teeth. Twenty-eight of them come in before puberty, but the last four teeth, our “third molars,” usually come in during our late teens or early 20′s, when we’re presumably older and wiser, hence their nickname, wisdom teeth. Lean more on this Moment of Science.
The human skeleton offers great insight into a person’s life. It will show the signs of disease, malnutrition, and injuries, as well as aging and sex. Experts can identify a skeleton’s sex by looking at two key areas: the skull and the pelvis.