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

Our biological sex is mainly controlled by our sex chromosomes. But sex hormones also influence what body parts and characteristics we have.

The rainforest is the wettest biome on Earth and is home to half of all species.Also in: Français | Español | Italiano |

What happens when a person wants to have a baby, but after years of trying, it just doesn’t happen? A lot of people want to become pregnant, but let’s learn about what may prevent pregnancy.

Does being born a son or a daughter mean your reproductive success might be different? In some societies, it does. 

Listen in as young women scientists, CG Schultz and Jessica Mathews, talk about their work and interview ASU ecologist Kiona Ogle. Pauline Davies hosts the show as Dr. Biology is still exploring the Panama rainforest to bring back fun and exciting stories. We hope he is not lost.

You hear that space is the final frontier, but could we have another frontier right here on Earth? The microscopic world offers a limitless opportunity to explore amazing places and life forms. You just need the right tool for the trip – a microscope. Guests Angela Goodacre and…

Not what you might think - the study of some grasses might unlock some important understanding to many areas of science including treatments for cancer. Dr.Biology talk with Stan Feath, professor in the School of Life Sciences at Arizona State University and learns what secrets…

Building Your Own Ant Farm is a 2-part Ask A Biologist video with Dr. Biology and Rebecca Clark on how to build an ant farm with two recycled CD cases. Watch part two.

small bugs on sticks

True bugs

Read True Bugs and then take this quiz to test your knowledge!

Body Depot

Body Depot

Body Depot is a collection of activities and materials created in collaboration with with the Arizona Science Center. The Body Depot includes activities on DNA, proteins, bones, immune function…

puzzle pieces with beetles on them

Beetles

Read How Do Beetles Reproduce? and then take this quiz to test your knowledge!

Solving mysteries illustration

Using the Scientific Method: The Case of the Mystery Images

Play The Case of the Mystery Images

Looking for another detective assignment? Practice all the new detective skills you learned in the…

Four mini-illustrations of a water bottle, the sun, a child, and sun protective wear (hat, glasses, and light t-shirt)

Beat the Heat

Play Beat the Heat

Staying safe in the heat is more than just a game, it can be a life saver. Luckily, you can see if you have what it takes to…

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…

Cell viewer game

Cell Parts Game

Explore the Cell Viewer Game

Cells are the basic building blocks of life, but what all do cells hold? You can now look inside of cells to learn…