Big Idea: Homeostasis is maintained through physiological processes.

Temperature is an important part of life on Earth and life in space. This backgrounder explains what temperature is, how it affects people and how it is controlled on the International Space Station.

Spending time outside has important physical and psychological benefits. It can even help you learn better!

Learn about the biochemistry of cooking meringue.

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.

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

Humidity is an important part of life on Earth and life in space. This backgrounder explains what humidity is, how it is measured and how it affects us both mentally and physically.

How do our bodies get cold? How do sleeping bags keep us warm?

Become a pro at washing dishes! Learn how the chemical structure of detergent makes it perfect for attracting grease and grime.

Panic attacks are scary and they upset your body’s chemical equilibrium. Learn what happens to acids & bases in your circulatory system during a panic attack.

This backgrounder explains the different ways that cells repair damage to DNA.

Do you like butter? Find out how easy it is to make!