Whether they're extremely rare or common, they can dramatically diminish our quality of life, alter our mindset, or perception of reality. Here are the 10 most common and 10 rarest diseases.

The mere mention of common garden plant diseases is enough to make even the most experienced gardener feel anxious. Online resources abound, but learning to properly identify problems can ...

Most common diseases and most quantitative traits that can be measured in human populations are complex genetic traits. That is, many genetic and nongenetic factors interact to determine the final ...