Welcome to Ask A Biologist. This site has a large collection of biology learning materials that includes stories, games, activities, videos, and a podcast.

As you go about your day, breathing and thinking, with your heart beating, your body is working. It sends and receives signals, grows, and stores fat, among hundreds of other functions. All of these functions make up your physiology, or how your body works. The same is true for every living animal.

Every year, vaccines protect millions of people from getting sick. But how, exactly, do vaccines work? Learn the science behind how vaccines protect us from disease.

For many organisms, reproduction is a huge part of life. But what, exactly, does reproduction mean? Well, it can mean so many different things, including breeding or not, caring for young (or not), or giving birth (or not)... read on to learn about the diversity of ways that organisms reproduce.

Bonobos and chimpanzees look a lot alike and they use similar gestures or movements to communicate. But do the same gestures always mean the same thing?