People who are involved in sports and recreational activities experience numerous injuries in the pursuit of enjoyment. One would think that the physical contact sports would be the ones producing most of these problems and a competitor would remain relatively uninjured in the more individual sports that involve no contact or collision with another person. [...]

When you were a kid in school, you learned that each molecule of water is made up of two hydrogen atoms and one oxygen atom. You may also have learned that it was great fun to fill up your squirt guns with water, at least until the principal caught you. What you may not have [...]