![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.
![Coniferous and deciduous trees covered in snow](/sites/default/files/styles/resource_card_image_360x300_/public/2020-03/coniferous_deciduous_snow.jpg?itok=FwvMVkpV)
How Do Trees Survive in Winter?
STEM Explained
What adaptations and processes do trees in northern climates have to survive winter?
![Cow](/sites/default/files/styles/resource_card_image_360x300_/public/2020-03/Cow.jpg?itok=K9RkR2Rv)
Cows, Methane, and Climate Change
STEM Explained
How do beef and dairy cows contribute to climate change? Livestock agriculture is a source of methane, a powerful greenhouse gas.
![Ketchup bottle and ketchup spill](/sites/default/files/styles/resource_card_image_360x300_/public/2020-03/ketchup_spill.jpg?itok=p-UzhYcC)
Why is ketchup so hard to pour?
STEM Explained
Ever go to pour ketchup on your fries… and nothing comes out? We’ll let the secrets about the viscosity of this non-Newtonian fluid out of the bottle!
![Platinum crystals](/sites/default/files/styles/resource_card_image_360x300_/public/2020-02/Platinum-crystals.jpg?itok=CIVtGM1E)
Catalytic Converters
STEM Explained
Learn about how catalytic converters make vehicle emissions less harmful.
![Abandoned superstructure of Kola Superdeep borehole](/sites/default/files/styles/resource_card_image_360x300_/public/2019-10/superstructure_Kola_Superdeep-borehole.jpg?itok=mBCmyHR7)
The Deepest Hole in the World
STEM Explained
Drilling into Earth’s Interior is no easy task. The Kola Superdeep Borehole is one of the projects that tried to do it.
![Blue whale swimming](/sites/default/files/styles/resource_card_image_360x300_/public/2019-10/Blue_whale.jpg?itok=jItzw1qc)
Can Whales Really Explode?
STEM Explained
When deceased whales wash up on shore, people fear they might explode. Gas laws, decomposition reactions and organic chemistry can help us understand this fear.
![Smoke from a crop-duster shows wake turbulence](/sites/default/files/styles/resource_card_image_360x300_/public/2020-03/crop_duster_wake_turbulence.jpg?itok=fnV4IiYR)
What is Air Turbulence?
STEM Explained
Learn about the science behind the four main causes of turbulence.
![Looking at a donut and a brain through a magnifying glass](/sites/default/files/styles/resource_card_image_360x300_/public/2020-02/human-brain-with-donut.jpg?itok=sDa9et9m)
How Sugar Affects the Brain
STEM Explained
Consuming sugary foods and drinks activates your brain’s reward system - the same system that can cause addiction.
![Screen capture from video "The Wacky History of Cell Theory”](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/screen_shot_cell_theory.png?itok=XaFJP-YW)
The Wacky History of Cell Theory
STEM Explained
It took several scientists building on each other’s discoveries to come up with Cell Theory - one of the cornerstones of biology.
![Browning apple](/sites/default/files/styles/resource_card_image_360x300_/public/2020-03/Browning_apple.jpg?itok=0ChBaFX8)
Why Do Apples Turn Brown After You Cut Them?
STEM Explained
Has your fresh juicy apple turned an unsightly brown? Learn about the redox reaction behind the transformation.
![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.
![Thundersnow near a cabin on a hillside](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/Thundersnow_near_cabin_on_hillside.jpg?itok=IugkyK5e)
Thundersnow: winter thunderstorms
STEM Explained
When thunder and lightning occur but the main form of precipitation is snow, not rain, it’s called thundersnow.
![A variety of lava lamps](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/Assortment_of_lava_lamps.jpg?itok=IsXk69sI)
Lava Lamps
STEM Explained
Lava lamps are very interesting to look at. But they are also interesting examples of buoyancy, heat transfer and solubility!