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

Alzheimer's and other brain diseases affect millions of people. Jeffrey Kordower and his colleagues are learning more about these neurodegenerative diseases so that we can try to treat them.

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?

Learn about mosquito life cycles, the dangers of mosquitoes, and how to protect yourself and reduce breeding grounds for mosquitoes around your home.

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.