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.

We usually worry about getting sick from other people or from spoiled food. But did you know that some animals, like rats and mongooses, can make you sick too?

Flowering plants, called angiosperms, are absolutely everywhere (even in Antarctica!). They are some of the most successful living things around. But what made them so successful?

Battling bacteria can be tough, as they can evolve quickly and resist many of our treatments. But Shelley Haydel is working on new ways to fight bad bacteria.