Get to know your body’s most important muscle -- your heart -- and learn how to take your own pulse!

Paul Andersen shows how homeostasis reflects of evolution through time. The endocrine system shows continuity through flatworms, earthworms and vertebrates. However the respiratory system shows change as organisms move onto land. The...

There's a chill in the air where Jessi and Squeaks live, and that means it's time for some animals to start the long, yearly nap called hibernation! Learn why animals hibernate and how they get ready to sleep for months at a time!

We don’t yet know the long-term health consequences of e-cigarettes, and gaining that knowledge could take decades. However, a recently published study in mice offers new data for consideration.

Cystic fibrosis is an inherited disorder that affects the lungs, pancreas, intestines and other organs. A genetic mutation leads to secretory glands that don't work well; lungs can get clogged with thick mucus; the pancreas can become...

Tuberculosis had a big impact on George Orwell's life and on his novel "1984." Drawing parallels between Orwell's struggle with TB and the themes of isolation, surveillance, and control in the novel, it delves into how Orwell's personal...

An ethically questionable new genetic technique attempts to grow human organs inside of pigs.

Why Do We Yawn?

AJ Muss is just 23 years old, but his has been an eventful life so far. As an alpine snowboarder, AJ qualified for this year's Winter Olympics in PyeongChang, South Korea, competing for Team USA— but that's not the...

Howcast - Learn breathing exercises to prepare for meditation from yoga instructor Lisa Dawn Angerame in this Howcast video.

Howcast - Learn how to deal with stress at work from wellness consultant Samantha Ibarguen in this Howcast video.

Howcast - Learn deep breathing for stress reduction from wellness consultant Samantha Ibarguen in this Howcast video.

Howcast - Find out if hookah or cigar smoking is safer than smoking cigarettes from addictions counselor Adam Steiner in this Howcast video.

Howcast - Learn how to do circular breathing in this Howcast video.

Howcast - Learn sax breathing exercises in this Howcast video.

Howcast - Learn about the benefits of using eco-friendly cleaning supplies in this Howcast video featuring Alegre of Green and Greener.

Howcast -Mesothelioma is an rare and aggressive form of cancer that affects the thin layer of tissue that surrounds the organs, known as the mesothelium. Perform a self-exam with these guidelines to recognize this disease.

Howcast -Buoyancy levels vary from person to person. Learn which factors you can control and hone your buoyancy skills to achieve a constant depth in mid-water.

In 2008, David Blaine held his breath for over 17 minutes, breaking the world record for oxygen-assisted static apnea, a form of holding your breath underwater. Here's how he did it.

Pandas are notoriously curious, and today is no exception.

This little guy has a ton of energy.

Animation describing symptoms of acute and chronic bronchitis

How many veterinarians does it take to wrangle a panda cub for a routine physical exam?

This little guy has a ton of energy.