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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All living beings are made up of cells. Some of them are made up of only one cell and others have many cells. Also in: Español | Français | Deutsch…

Much like a mechanical watch, living things only work when all the gears work together. Some of the tiniest of gears are proteins. Learning about the shape and size of these proteins is the job of X-ray crystallography.

It is surprising how much of the land on Earth is what scientists call drylands. You might think that these areas are not crucial to life on the planet, but in fact, they are. They are also some of the most challenging places to do research. Part of the challenge is what we see above ground is only…
Alzheimer’s disease makes it difficult to remember many things – like where you live, the names and faces of family members, and even your own name. ASU professor Diego Mastroeni’s job is to study Alzheimer’s disease, and to hopefully find a way to cure it.

If you had x-ray vision, where would you look first? Some of our biologists have looked inside of beetles to learn more about how they breathe and fly.

An interview with biologist Dave Pearson research professor in the School of Life Sciences at Arizona State University and Audubon environmental educator Cathy Wise. Dr. Biology learns from his two guests that bird watching is pretty cool and fun.

Television portrays the lives and work of forensic artists, but what is it like to really be a forensic artist? Are the tools you see on the big and little screen really used by the people who recreate the face of someone when there might only be a skull or parts of a scull to use as a starting…

An interview with palynologist Vaughn Bryant from Texas A&M. Listen in as Dr. Biology learns how pollen is providing clues for more than scientists. These tiny bits of information turn out to be something more than sneeze triggers.
Why do we have seasons?

Seasoned to the Tilt

Have you ever thought about your favorite season, and why it looks and feels the way it does? This activity will help you see and understand why Earth has seasons, and the two things that…

An illustration of different cell sizes and a ruler, to measure nuclear cytoplasmic ratios

Cell Size SIM

Play the Cell Size SIM

Certain cell types should have a general size and have proportionate parts. But what if those sizes and proportions are…

an image with some lizards of different colors on it

Lizards

Read Mighty Morphing Tree Lizards and then take this quiz to test your knowledge!

Plankton Zoom Gallery (Plankton up-close)

Plankton comes in many shapes and sizes. These are just a few of the thousands of examples.

Pollen Gallery (Pollen up-close)

Pollen comes in many shapes and sizes. These are just a few of the thousands of examples.

Feather Zoom Gallery (Feathers up-close)

There is nothing like seeing a feather up close.

Ant Gallery (Get up-close to ants)

Now is the time to check out these amazing animals from the safety of your own computer.

Tree lizard puzzle

Mighty Morphing Tree Lizards

Biologists at Arizona State University hope that by learning more about animal behavior, they will also be able to understand why people act the way they do. Also in:…

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Two illustrated bats

Bats

Like humans, bats are mammals. They are warm-blooded, covered in hair, have live young, and nurse their young (called pups). Unlike humans, bats have wings, which allow them to fly.Also in:…

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Two green salamanders

He Ain't Tasty He's My Brother

While cannibalism is fairly common among insects and crustaceans, most backboned animals avoid feeding on their own kind.

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Big Bad Beetles

A story of blood, love, and family… Learn about one of the biggest and fanciest blister beetles anywhere. This species goes by the scientific name of Lytta magister but has also been called the…

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