Cataracts Facts. 1  Cataracts are changes in clarity of the natural lens inside the eye that gradually degrade visual quality. The natural lens sits behind the colored part of the eye (iris) in the area of the pupil, and cannot be directly seen with the naked eye unless it becomes extremely cloudy.
Hershey and Chase. Alfred Hershey and Martha Chase did an Experiment in 1952 that was called the Hershey-Chase Experiment. This experiment set out to determine what composed the genetic material of a bacteriophage. A bacteriophage is a virus that infects a bacterium.
Originally called the Hershey Industrial School, it was designed to train boys in farming and industrial trades so they would become able to support themselves. After Kitty Hershey died in 1915, Hershey donated his entire fortune-$60 million-in a trust to the school. It was renamed the Milton Hershey School and expanded to serve children of both sexes from disrupted homes from kindergarten through high school.