This is the fourth book in a sequence of four volumes written and designed for parents of students of science, particularly for those at the lower and upper elementary and junior high or intermediate level, senior high students, college students preparing to teach science, and all those individuals who are interested in science and the application of science in daily life. This volume consists of two chapters that contain 46 discrepant events (occurrences or happenings which go against what we usually think likely): one dealing with plants and the different variables that influence their growth, and the other containing demonstrations and activities about human biology. Instructions for each event include materials, procedure, questions, and an explanation. Emphasis is placed on the use of simple materials. A list of available science educational materials from Science Inquiry Enterprises is included and an index is provided. (LZ)