![Assortment of the bacteria Escherichia coli](/sites/default/files/styles/resource_card_image_360x300_/public/2020-01/Escherichia_coli.jpg?itok=Vipd9pT-)
Introduction to Bacteria
Backgrounders
What exactly are bacteria? What types of bacteria are there? And are they really as bad as people think they are?
![Inflammation of the knee](/sites/default/files/styles/resource_card_image_360x300_/public/2020-03/inflammation_of_the_knee.jpg?itok=KtxxSVOD)
The Immune Response: A Cellular War
STEM Explained
An inflammatory response is your body’s attempt to fight invaders. Learn how your body springs into action when attacked!
![Coronavirus](/sites/default/files/styles/resource_card_image_360x300_/public/2020-03/coronavirus.jpg?itok=FbivauIM)
Introduction to Viruses
Backgrounders
Learn about the basics of viruses.
![Calico cat](/sites/default/files/styles/resource_card_image_360x300_/public/2020-03/calico-cat.jpg?itok=qlSaiPIC)
The Science Behind the Calico Cat's Colours
STEM Explained
The patchwork fur colour of Calico and tortoiseshell cats is an interesting case of genetics, heredity and sex-linked traits.
![Greta Bauer](/sites/default/files/styles/career_image/public/2020-02/Greta%20Bauer.jpg?itok=AMYJ-alj)
Greta Bauer
Professor, Epidemiology and Biostatistics
![Jillian Croke | Pharmacienne et pharmacienne gestionnaire](/sites/default/files/styles/career_image/public/2020-07/jillian3.jpg?itok=0pzQHi86)
Jillian Croke
Pharmacist/Pharmacy Manager
![Red-haired woman](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/red-haired_woman.jpg?itok=E7j3ahqo)
The Chemistry of Redheads
STEM Explained
Learn how chemistry and genetics makes redheads stand out from the crowd.
![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.
![Cartoon of people cleaning teeth](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/Cartoon_dentists_cleaning_a_tooth.jpg?itok=vK4Ow00y)
How can chemistry help you take care of your teeth?
STEM Explained
What are your teeth made up of? What chemistry is at work in your mouth? Why do some people get cavities even if they brush regularly?
![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.
![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.
![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.
![A 3D-rendered illustration of stem cells](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/3D_rendering_stem_cells.jpg?itok=FILo3TBN)
My Stem Cell Donation Story
STEM Explained
In April 2016, Let’s Talk Science volunteer Daniel Tarade donated stem cells to help a person who needed a stem cell transplant to survive. Learn what stem cells are, how and why people donate, and what Daniel’s experience was like.
![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.