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

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Nicholas Stephanopoulos works with tiny structures so small you can only see them by using powerful microscopes. Some might say he's a builder, but he actually gets the molecules to do the building themselves.

Most of us wish we could predict the future. We want to know everything from who will win the big football game to whether or not our favorite superhero will defeat the super villain. Biologists want to know the future too.

Exploring space is exciting but are there drawbacks for astronaut immune function? Scientists are investigating how spaceflight affects immunity in fruit flies.