The warm, damp environments of your showerhead and toothbrush are the perfect breeding ground for microbes, and a new study has identified hundreds of viruses that live there, showing the vast biodiversity to be found in the average home.

Researchers at Northwestern University studied two things that most people use everyday—their toothbrush and showerhead—to see what was living in each.

A new study has found more than 600 different viruses residing on everyday household items like showerheads and toothbrushes. The lead researcher of the study described this number as “absolutely wild.”