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

You may see advertisements for vitamins all the time. Do we really need vitamins? And if we do, how do we know which vitamins are high quality? Take a tour into the history, science, and manufacturing of vitamins.

Scientists thought that flying reptiles known as Pterosaurs were slowly dying off before an asteroid caused a huge die-off on Earth. But new fossils found in Africa tell a different story.

RNA is an important molecule that often helps your body make proteins. But RNAs aren’t all the same—some may help your immune cells fight off infections by providing them with extra sugar.

Honeybees need the bacteria in their bellies to stay healthy, but the medicine we give them may be wiping them out.