Antibiotics (A True Book: Greatest Discoveries and Discoverers)

Many of the world's most dangerous illnesses are caused by tiny living things called bacteria.

Bacterial sicknesses once killed countless people. However, thanks to drugs called antibiotics, many types of deadly bacteria are no longer a major problem. Readers (Grades 3-5) will find out how scientists first began studying bacteria, how they created the earliest antibiotics, and how bacteria and antibiotics could change in the future.

Tamra B. Orr is the author of "After Homeschool," "The Parents' Guide to Homeschooling," "The Purple Cow Guide to Extraordinary Essays," and "Violence in Our Schools," She lives in Portland, Oregon.