Why do our muscles get tired and sore after exercise? Explore how our muscles function, and how you can exercise longer without experiencing muscle fatigue. -- You're lifting weights. The first time feels easy, but each lift takes more...

Biology and technology grew closer together when scientists manufactured neurons that acted like those in a brain! And birds evolved to protect themselves in two ways: fight and flight.

We have some good news this week for all the James Webb fans out there, as well as a look a some creative chemistry that may help us find the first solid evidence of an exomoon!

From wasps nests to nuclear reactors. Here are just a few clever ways archeologists figure out how old something is.

So, we know what materials are, but can we make new materials? Or improve the materials we already have? In this episode of Crash Course Kids, Sabrina shows us how Material Scientists are working on these two things today. Also, your...

There have been lots of recommendations over the years to eat a low-sodium diet. We've talked about the evidence on this before. Well, get ready to taste salt again. Research points to the conclusion that low sodium diets don't do much...

Howcast - Learn if coconut water is good for you from nutrition expert Alex Jamieson in this Howcast video.

Howcast - Learn what makes pumpkin a superfood from nutrition coach Lisa Neilsen in this Howcast video.

There's nothing in the average commercial sports drink that you can't mix together for your own, far less expensive and healthier version. Check out this easy recipe.

The sodium-potassium pump uses active transport to move molecules from a high concentration to a low concentration. The sodium-potassium pump moves sodium ions out of and potassium ions into the cell. This pump is powered by ATP. For...

Discover the truth about lattice energy and why size really matters in ionic bonds. In this video, you'll learn what lattice energy is, why it's crucial in chemistry, and the factors that influence its strength. Understand how the size...

When you wake up, it takes some time to get the electrolytes flowing through the muscles in your hands again. That’s why you may not be able to make a fist right after waking up. This effect is more pronounced if you don’t wake up...

The traditional name for water-soluble salts and minerals that contain potassium.
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A highly reactive group of metals that make up group one in the periodic table.
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An inorganic chemical element necessary for human growth and health, such as iron, sodium, potassium, or magnesium.
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Although radioactive materials are associated with power stations and bombs, we live with radioactive substances all around us. What are they, and do they affect us?
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Potassium is one of the most unpredictable elements, a soft metal that is essential to life.



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Plants produce oxygen and provide our food, but what do they need to live? Learn why nitrates, phosphates, potassium and magnesium are vital for plant health. Biology - Plants - Learning Points. Understanding how plants grow ensures we...

Potassium nitrate is a natural substance found in your food, or in an exploding firework. What makes it so versatile? Chemistry - Chemical Industries - Learning Points. Potassium nitrate preserves our food and is a component of...

Learn why electron shells are responsible for the properties of elements, and whether they are stable or have violent reactions. Chemistry - Atoms And Bonding - Learning Points. An element's reactivity is determined by the number of...

Exploring the science behind fireworks, discover how different elements are used to produce different colours of fireworks. Chemistry - Atoms And Bonding - Learning Points. In the mid-19th century the inventor if the Bunsen burner,...

Witness the exciting reactions that occur when alkali metals come into contact with other substances. What does this tell us about their properties? Chemistry - Periodic Table - Learning Points. The alkali metals make up Group 1 of the...