Creepy Critters - Why do we classify things?

We classify things into groups and categories to help us stay organized, keep track of things and be able to compare different things. For example, similar foods are grouped together on supermarket shelves to make it easier for customers to find them. Different brands of peanut butter sit on the same shelf so you can compare one to another and decide which you prefer. Scientists classify living things to help explain their relationships to each other and to be able to learn things about newly discovered creatures by noting their similarities to known creatures.

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American Society for Microbiology