![Bread and wheat with a warning sign](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/gluten-intolerance-with-bread-and-wheat.jpg?itok=Ytq99uNA)
Celiac Disease: When You Really Need to Stay Gluten-Free
STEM Explained
Celiac disease is an autoimmune disorder. Gluten triggers an immune system response, seriously affecting nutrition.
![Suffering from a hangover](/sites/default/files/styles/resource_card_image_360x300_/public/2019-11/suffering_from_a_hangover.jpg?itok=6Wjz2McS)
Why Do People Get Hangovers?
STEM Explained
Why does drinking too much alcohol make people feel so bad? Read about four theories.
![People with cancer and their caregivers](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/People_with_cancer.jpg?itok=kpFHke8P)
Why Do So Many People Get Cancer?
STEM Explained
We all know someone who has been affected by cancer. What causes cancer? Why is it getting more common?
![What is in blood?](/sites/default/files/2019-08/wiki-Blood_cells.jpg)
What is in blood?
Hands-on Activities
Make a model of blood and learn about the function of each of the parts that makes up blood.
![What are the best materials to use for cleaning water?](/sites/default/files/2019-08/what-are-the-best-materials-to-use-for-cleaning-water.jpg)
What are the best materials to use for cleaning water?
Hands-on Activities
Water is a precious natural resource. What happens if it gets polluted? Learn how water can be cleaned with this hands-on activity?
![Students studying outdoors on grass](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/Friends-studying-on-grass.jpg?itok=lXTVfdrZ)
The Benefits of Going Outside
STEM Explained
Spending time outside has important physical and psychological benefits. It can even help you learn better!
![A set of lipstick in various colours](/sites/default/files/styles/resource_card_image_360x300_/public/2020-02/Assortment_of_lipsticks.png?itok=z_U-KbdM)
The Chemistry of Lipstick
STEM Explained
Learn about the organic compounds that make up lipstick as well as about some of the chemistry that goes into this popular cosmetic.
![DNA barcoding used to test food](/sites/default/files/styles/resource_card_image_360x300_/public/2020-02/DNA_barcoding_food_testing.jpg?itok=Hidu7x3v)
The Classification of Life: From Linnaeus to DNA Barcoding
Backgrounders
Learn about two taxonomy systems that scientists use to classify the life around us.
![Finger with a drop of blood](/sites/default/files/styles/resource_card_image_360x300_/public/2019-10/Finger_with_a_drop_of_blood.png?itok=9rIlbgSt)
The Immune Response
STEM Explained
When you cut your finger, your immune system kicks in to protect you from pathogens.
![man sick with the flu](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/man_sick_with_the_flu.jpg?itok=5C2Zm7yV)
The Surprising Reason You Feel Awful When You're Sick
STEM Explained
Viruses can make you feel awful! This article explains how feeling bad might be your immune system’s way of helping you heal.
![Cartoon mammoth](/sites/default/files/styles/resource_card_image_360x300_/public/2019-10/Cartoon_mammoth.jpg?itok=yPc7tmR_)
Should Scientists Clone Extinct Species?
STEM Explained
Cloning makes it possible to bring extinct species back to life. But is that a good idea?
![Former Canadian astronaut Robert Thirsk enjoys cycling on board the ISS](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/Robert_Thirsk_cycling_on_ISS.jpg?itok=YDleE__K)
Spaceflight and Bone Loss
STEM Explained
Astronauts can experience bone loss in space. To understand why, you need to know a bit about how bones are formed and maintained in your body.
![Replica of the earliest wooden model stethoscope](/sites/default/files/styles/resource_card_image_360x300_/public/2020-02/stethoscope_replica_ingenium.jpg?itok=RgHTg8L2)
Stethoscope Replica
Interactives
Using stethoscopes, doctors can use sound waves to detect various health issues. Learn how this device has evolved since it was invented in 1816!
![Great tits eat from a bird feeder](/sites/default/files/styles/resource_card_image_360x300_/public/2019-10/Great_tits_bird_feeder.jpg?itok=aiRpq_-G)
Natural Selection in Your Backyard
STEM Explained
A study on bird feeders and beak sizes shows how an everyday human activity can affect the evolution of another species.
![Bottle of Measles, Mumps, Rubella (MMR) vaccine](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/Measles_Mumps_Rubella_vaccine.jpg?itok=9iioBN0c)
Measles and Measles Prevention
STEM Explained
Learn about the measles virus, its impact and vaccination for prevention of the disease.