Sigma Xi, The Scientific Research Society, an honorary organization dedicated to research in the pure and applied sciences. Individuals are elected to membership on the basis of their achievement or potential achievement in scientific research. The society publishes American Scientist, a bi-monthly. The organization was founded as Sigma Xi in 1886. In 1974 it absorbed the Scientific Research Society of America. Membership is approximately 110,000. Headquarters are in Research Triangle Park, North Carolina.
Every day, astronomers unravel a little more of the universe's inner workings, but the jury is still out on 95 percent of its contents.
We hear about humidity in just about every weather report on the nightly news. There are several different ways meteorologists measure humidity, but relative humidity is the most common measurement. What is relative humidity, though? Find out in this