![Electronic cigarette and traditional cigarettes](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/man-holding-electronic-cigarette.jpg?itok=Mx6yukyD)
Is Vaping Safer Than Smoking?
STEM Explained
Learn how e-cigarettes and other vaping products work, and why scientists and health professionals have concerns about their safety.
![orn ethanol plant next to corn field](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/ethanol_plant_and_corn_field.jpg?itok=eSz-wZxP)
How is Ethanol Made?
Backgrounders
Ethanol is a biofuel that can power a car. Learn about the enzymes, catalysts and processes like fermentation involved in ethanol production.
![Lawn mower mowing grass](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/image%2C.jpg?itok=7Rfn7uh2)
How Do Plants Use Chemical Signalling?
STEM Explained
How do plants use scents? Learn how some plants use chemical signals to send messages to animals or other plants.
![Gingerbread house](/sites/default/files/styles/resource_card_image_360x300_/public/2019-09/gingerbread-house.jpg?itok=a0Cvegou)
A Merry Molecular Christmas
STEM Explained
Many holidays mean delicious food - and smells! This fun article looks at the chemistry behind the common aromas of Christmas.