This backgrounder explains the potential effects of radiation on the human body.

This backgrounder explains what temperature is, how it is measured, how it affects people, and how it is controlled on the International Space Station.

This backgrounder explains what noise is, how it is measured, and how it affects our hearing, wellness and more.

Electricity demand changes constantly. Suppliers need to generate more electrical energy when demand is high, and less when demand is low.

Today, you know it's the same time everywhere in your time zone thanks to Universal Coordinated Time. But when humans used the Sun to tell time, they couldn’t tell time precisely.

This backgrounder explains what light is, how it is measured, and how it affects people on Earth and astronauts on board the International Space Station.

This backgrounder explains what greenhouse gases are and how they contribute to climate change.

Learn about how craters are formed and about some of Canada's impact craters.

Ethanol is a biofuel that can power a car. Learn about the enzymes, catalysts and processes like fermentation involved in ethanol production.