Marie Curie studied the radiation of all compounds containing the known radioactive elements, including uranium and thorium, which she later discovered was also radioactive. She also found out that: - you can exactly measure the strength of the radiation from uranium; - the intensity of the radiation is proportional to the amount of uranium or thorium in the compound - no matter what compound it is; - the ability to emit radiation does not depend on the arrangement of the atoms in a molecule; it must be linked to the interior of the atom itself - a revolutionary discovery!
When she realized that some uranium and/or thorium compounds had stronger radiation than uranium, she made the following hypothesis: there must be an unknown element in the compound which had a stronger radiation than uranium or thorium. Her work aroused the interest of her husband, Pierre Curie, who stopped his own research on crystals and joined the "detective work" with his wife. And Marie was proven right: in 1898 the Curies discovered two new radioactive elements: radium (named after the Latin word for ray) and polonium (named after Marie's home country, Poland).
“The a long time from 1865 to 1900 in American Society were ones intensely affected by industrialization. … Society was adversely influenced as monopolists started to require over financial matters, legislative issues changed as specialists started to create unions, and production line work changed due to unused mechanical methods.
According to his critics, President Roosevelt proposed increasing the number of justices on the Supreme Court because he knew some of them would resign--meaning he could "pack the court".
