Health

Astronauts can experience bone loss in space. To understand why, you need to know a bit about how bones are formed and maintained in your body.

Using stethoscopes, doctors can use sound waves to detect various health issues. Learn how this device has evolved since it was invented in 1816!

Learn about the measles virus, its impact and vaccination for prevention of the disease.

Errors during meiosis can alter the number of chromosomes in cells and lead to genetic disorders.

In April 2016, Let’s Talk Science volunteer Daniel Tarade donated stem cells to help a person who needed a stem cell transplant to survive. Learn what stem cells are, how and why people donate, and what Daniel’s experience was like.

Sodium is a useful chemical element. You consume it as table salt regularly. Learn about salt mining, sodium uses, and what problems too much sodium can cause.

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

Many doctors prescribe antibiotics to cure infections. But should they be prescribing viruses instead?

Get your hands cold for science and explore the topic of sensory adaptation.

Many people believe that hookah smoking is safer than cigarette smoking. But in fact, hookah smoking can be even more harmful to your health!

Did you know that too much carbon dioxide in the classroom can affect your body, and even your grades?

Learn how e-cigarettes and other vaping products work, and why scientists and health professionals have concerns about their safety.

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.

Make some fake snot and explore the function of mucus in this fun activity.

Take a closer look at food packaging. Explore why and how food is packaged in different ways.