![icon of embryo in hands](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/in-the-doctors-hands-the-icon-of-the-embryo.jpg?itok=Cdc3gCG-)
What if You Could Choose Your Baby?
STEM Explained
Many people have had children using assisted reproductive technologies. But some of these medical biotech techniques can raise some ethical issues.
![Battery of Stiger Vortex rainmaking guns at Charleville, Australia, in 1902](/sites/default/files/styles/resource_card_image_360x300_/public/2019-11/Stiger_rainmaking_guns.jpg?itok=4-aCsJPP)
What is Cloud Seeding?
STEM Explained
Cloud seeding is a type of weather modification. Learn about cloud seeding, as well as its risks and benefits.
![Thermal images of people and objects](/sites/default/files/styles/resource_card_image_360x300_/public/2019-10/Thermal_images_of_people_and_objects.png?itok=5vLkf21V)
Thermopower and the Body Heat-Powered Flashlight
STEM Explained
Can your body be a source of electricity generation? Maybe, if you understand heat transfer. Explore this concept through a 2013 invention by a Canadian teen.
![Like trees, brains grow and develop](/sites/default/files/styles/resource_card_image_360x300_/public/2019-10/How_a_brain_is_like_a_tree.jpg?itok=K6H2lR4a)
Understanding the Teen Brain
STEM Explained
Teen brain development prepares teens for adulthood, but also affects their emotions.
![Plastic drinking straws](/sites/default/files/styles/resource_card_image_360x300_/public/2020-06/plastic_drinking_straws.jpg?itok=jMA-xYeF)
We Use a Lot of Plastic
STEM Explained
What are microplastics? How are plastics polluting aquatic ecosystems?
![Mars Science Laboratory Parachute Qualification Testing](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/Mars_science_lab_parachute_testing.jpg?itok=Ly8xx3i5)
Testing Parachutes for Mars
STEM Explained
NASA engineers apply kinematics and dynamics to test parachutes designed specifically to help space probes land safely using aerodynamics.
![A person’s hand holding a cold pack on an ankle](/sites/default/files/styles/resource_card_image_360x300_/public/2020-06/person_holding_ice_pack.jpg?itok=01sj50jv)
The Cold Pack: A Chilly Example of an Endothermic Reaction
STEM Explained
When you hurt your ankle, thermodynamics can help you heal! An endothermic reaction reduces the swelling by cooling your injury.
![Wasted food on the ground](/sites/default/files/styles/resource_card_image_360x300_/public/2019-10/food_waste_on_ground.jpg?itok=Hpl8H3ev)
The Environmental Impact of Wasted Food
STEM Explained
One-third of all food produced is wasted. Learn about the environmental consequences of food waste, and what you can do about it.
![Screen capture from the TED Ed video “The genius of Mendeleev's periodic table”](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/Mendeleev_video_screen_shot.jpg?itok=LmlKtLid)
The Genius of Mendeleev's Table
STEM Explained
Dmitri Mendeleev’s version of the periodic table was brilliant - find out why!
![AeroVelo's winning flight](/sites/default/files/styles/resource_card_image_360x300_/public/2019-10/Aerovelo%27s_winning_flight.jpg?itok=LW292kJO)
The Hovering Human
STEM Explained
Learn how a team of Canadian engineers used Bernoulli’s Principle to design a human-powered helicopter. It set a world record for human-powered hovering flight!
![Keplers Supernova. Image © NASA](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/Keplers%20Supernova.jpg?itok=VFbU-ykR)
The Life and Death of Stars
STEM Explained
The life and death of stars form the chemical elements that make up Earth, making stars critical to life as we know it.
![The newest chemical elements](/sites/default/files/styles/resource_card_image_360x300_/public/2019-10/new-chemical-elements-nihonium-moscovium-tennessine-and-oganesson.jpg?itok=DnC4xsXM)
The Newest Elements on the Periodic Table
STEM Explained
The periodic table was last updated in 2016 with four new chemical elements. What is a chemical element? What is the atomic structure of the newest chemical elements? How did they get their names?
![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.
![Telegraph key used in Metcalfe, Ontario telegraph office (Ingenium)](/sites/default/files/styles/resource_card_image_360x300_/public/2019-07/5887.jpg?itok=h9OZd3T9)
Telegraph Key
Interactives
The telegraph works by transmitting signals through an electrical circuit. Learn more and print your own telegraph key using this 3d model of a real artefact.
![Crispy fried crickets © phuketisland, iStockphoto](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/Crispy%20fried%20crickets.jpg?itok=_fRDXG6u)
Should We Eat Bugs?
STEM Explained
What's tasty, abundant and high in protein and vitamins? Bugs! Bugs feed about 2 billion people each day. They also hold promise for food security and sustainability.