What’s the life of a cell like? In this episode of Crash Course Biology, we’ll follow a cell’s life cycle, from its beginning as a shiny new cell all the way to division via mitosis. We’ll learn how our cells control this process, and...

When someone gets a PET scan to detect tumors and how far a cancer has spread, that machine is actually detecting sugar. Because cancer has a sweet tooth, and this phenomenon, called the Warburg effect, may help us develop new cancer...

What happens when you divide things that aren't numbers?

Have you ever seen a tree with a big, twisted knot growing out of it? That's just one way that plants can show signs of cancer. Quick Questions explains.

The world has a lot to thank Henrietta Lacks for, and yet many do not know what she has contributed. From helping to create the polio vaccine to the study of radiation, Henrietta and her HeLa cells have changed the world.

The family of giants you work for is throwing a fancy dinner party, but there’s a problem — the elder giant’s favorite shirt is wrinkled! To fix it, you’ll need to power up the giant iron. It needs two batteries to work, but the baby...

We've run, jumped, and stomped all over the world of Super Mario, but, where in the universe is Super Mario EXACTLY? It's virtual so it obviously DOESN'T exist but if it did, could Super Mario world be in our solar system? And what do...

How do cells in your body differentiate into other types of cells? Explore cell specialization featuring stem cells and their role in cell differentiation.

Why don't we hear about people getting heart cancer? Turns out that some types of cells are less susceptible to cancer than others.

Our month-long exploration of human reproduction continues with a look at testicular anatomy, the steps of sperm production, and how it's influenced by gonadotropin and testosterone. Hank also explains how sperm mature, and how...

Your body is made of cells -- but how does a single cell know to become part of your nose, instead of your toes? The answer is in your body's instruction book: DNA. Joe Hanson compares DNA to detailed manual for building a person out of...

There’s one kind of tumor that’s basically straight out of a horror movie...

Inside our cells, each of us has a second set of genes completely separate from our 23 pairs of chromosomes. And this isn't just true for humans— it's true of every animal, plant, and fungus on Earth. This second genome belongs to our...

When it comes to our blood-producing stem cells, biologists have learned that bigger is not better. And a study has taken a look at the accomplishments and obstacles of an in-progress attempt to restore a large belt of degraded land...

Dutch artist Piet Mondrian's abstract, rectangular paintings inspired mathematicians to create a two-fold challenge. Can you solve the puzzle and get to the lowest score possible? Gordon Hamilton shows how.

Human bodies aren't built for extreme aging: our capacity is set at about 90 years. But what does aging really mean, and how does it counteract the body's efforts to stay alive? Monica Menesini details the nine physiological traits that...

Learn how scientists are fighting cancer... with algae!

Imagine something small enough to float on a particle of dust that holds the keys to understanding cancer, virology, and genetics. Luckily for us, such a thing exists in the form of trillions upon trillions of human, lab-grown cells...

The video provides a clear and concise explanation of division in mathematics. It starts by highlighting the relationship between division and other mathematical operations, such as multiplication and subtraction. It explains division as...

A video entitled "Decimal Expansions" that covers how decimal numbers can be converted to fractional form.

In this lesson we work through three different types of division problems that involve decimals:A decimal number as the divisorA decimal number as the dividendAnd decimal numbers as the divisor and the dividend

Math Kids 4th Grade Math - Long Division With Remainder V1-0004

This video provides a step-by-step guide on how to solve long division problems using partial quotients. By breaking down the process into manageable steps and...

Howcast - Learn how to understand the eighth note triplet rhythm on the bass guitar from musician John Sutton in this online guitar lesson from Howcast.

Howcast - Learn about bow divisions and rhythms for the violin from musician Julie Artzt Becker in this Howcast video.