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.
The story of Hersheyâs Chocolate begins with Milton S. Hershey. Raised as a poor farm boy, Hershey became fascinated with chocolate-making at the 1893 Worldâs Columbian Exposition. Hershey founded the Hershey Chocolate Company in 1894, and built the worldâs largest chocolate factory in 1903.