From periods of rapid aging in our 40s and 60s to ancient brains that don’t decompose, here are some of the year’s most intriguing stories about human biology It can sometimes feel like health ...

This lesson plan teaches students how the human body self-regulates to maintain a stable internal environment despite changes in the external environment -- a process called homeostasis. Most of the ...

An organ is a group of tissues that work together to perform a specific task in the body, such as digesting nutrients or producing chemical messengers that enable brain cells to communicate. Although ...