An international effort to make conversion problems difficult again.

Natural units are what groups of scientists in a common field of reasearch use to make math problems easier for themselves, and their work less intelligble to others.

Natural units result from scientists taking a certain physical property or measurement and assigning a value of 1 to it (see Astronomical Unit). This makes a lot of math problems very easy for those scientists. The problem is that you have to update every physical constant to the new units you're using, which means that instead of doing any real work, most scientists just sit around all day converting constants into special units that will take 5 minutes off the time it takes to solve the equation they're working on.

Students are usually left in total confusion as to which type of unit or constant to use on purpose, because most professors believe that it is just as important to learn arbitrary notation as it is to learn and understand the science you would use it for.