You know we have four seasons: spring, summer, fall, and winter. But do you know why we have seasons? Jessi shares the answer!

Did you know you can read the story of a tree's life? By looking at a tree's rings, you can figure out way more than just how old it is! Jessi and Squeaks are here to show you what to look for next time you're on a hike and find a tree...

Why do some regions experience full-time heat while others are reckoning with frigid temperatures and snow? And why are the seasons reversed in the two hemispheres? Rebecca Kaplan explains how the shape of the Earth's orbit around the...

So... do plants need dirt? The truth might shock you. In this episode of Crash Course kids, Sabrina talks about how plants get energy and how that energy is transported around them. Also, she talks about dirt.

Some trees lose their leaves in the fall, but some keep their green leaves all year round. Join Jessi and Squeaks to learn about evergreens: where they grow, and how they survive in harsh conditions!

Autumn means leaves are turning different shades of red, orange, and yellow and falling to the ground. But why? Jessi takes you deep inside a leaf to explain!

Jessi and Squeaks just learned about terrariums, and now they want to make one for themselves! Join them to learn all about these tiny gardens in a bottle and how you can make one of your own!

Green-minded architect and designer William McDonough asks what our buildings and products would look like if designers took into account "all children, all species, for all time."

Have you ever wondered how a tiny little seed grows into a plant? Well, there's a special kind of seed, one you've probably eaten before, that's big enough for you to open up and see how it works: a bean!

Jessi and Squeaks show you how a tiny seed, like the kind you eat in your trail mix! Grows into a big plant!

Jessi and Squeaks use the power of the sun to conduct a cool science experiment!

In this episode of Crash Course Astronomy, Phil takes you through the cause and name of the Moon's phases.

Hank describes why plants are so freaking amazing - discussing their evolution, and how their cells are both similar to & different from animal cells.

Beer & Biodiversity

New ReviewThis fascinating, colorful program uses common examples in nature to illustrate the process of competition. Whether it be plants in forests, fish on a coral reef, or birds in a meadow, living things compete for needed resources. Special...

New ReviewWe look at the process of refraction and explain the natural phenomena of rainbows.

This video is answering the question of what is marine snow.

This video is answering the question of what are hydrothermal vents.

While flying in an airplane, if you’ve ever noticed a bright colorful ring of color around the shadow of the airplane in the clouds, then you’ve seen a Glory! Glory is the name given to concentric circles of the spectrum of color on...

A video titled "Natural Resources" which discusses the population's strain on natural resources.

How cells find balance.

What is Chemistry? What are the states of Matter?? Find out in this video!

Howcast - Without trimming, fruit trees will not develop proper shape and form and will not produce high yields. There are two types of trimming that you should be concerned with: dormant pruning and summer training.

Howcast - If you have a confined space but still want to grow tomatoes, patio tomatoes are ideal because they only grow to be 2 feet tall.