Squeaks and Mister Brown are so excited about rockets, they're going to make their own! You can join in on the fun and learn how to make one too!

The history of discovering what DNA is, what it looks like, and how it works is... complicated. But, in this episode of History of Science, Hank Green does his best to lay out the basics so we can understand the beginnings of Biotechnology.

In this video Paul Andersen explains how the reaction quotient is used to determine the progress of a reversible reaction. The reaction quotient (Q) is the ratio of the concentration of products to the concentration of reactants. The...

In this video Paul Andersen explains how a radioactive nuclei can decay by releasing an alpha, beta, or gamma particle. The exact moment of decay for each nuclei can not be determined but probability is useful in predicting the...

In this video Paul Andersen explains how modeling instruction can be used in the science classroom. Instead of presenting a model for the students the teacher presents and experience or experiment and the students develop the model.

What happened when a gambler asked for help from a mathematician? The formal study of Probability.

How did we get here? Well, in terms of Atomic Chemistry, Hank takes us on a tour of the folks that were part of the long chain of other folks who helped us get to these deeper understandings of the world. From Leucippus to...

Thanks to observations of galaxy redshifts, we can tell that the universe is EXPANDING! Knowing that the universe is expanding and how quickly its expanding also allows us to run the clock backwards 14 billion years to the way the...

Today, we’re moving on from artificial intelligence that needs training labels, called Supervised Learning, to Unsupervised Learning which is learning by finding patterns in the world. We’ll focus on the performing unsupervised...

In this video Paul Andersen explains how metallic solids form when delocalized electrons hold the positive nuclei in an electron sea. This model helps to explain the properties of metals like conductivity, shiny appearance,...

In this video Paul Andersen explains how metallic bonding structure creates the different properties of metals. The electron sea model explains how the positive nuclei are locked into a negative sea of delocalized electrons. This...

In the mid-19th century, suspension bridges were collapsing all across Europe. Their industrial cables frayed and snapped under the weight of their decks. So when German American engineer John Roebling proposed building the largest and...

In this video Paul Andersen explains how the atomic model has changed over time. A model is simply a theoretical construct of phenomenon and so when we receive new data we may have to refine our model. Ionization energy data resulted...

In this video Paul Andersen explains the parts of the Solar System; including the planets, dwarf planets, moons and asteroids. He explains how everything orbits around the Sun and how a proper understanding of this heliocentric model...

In this video Paul Andersen outlines the AP Environmental Science course. He explains how environmental science studies the interaction between earth and human systems. A planetary boundary model is used to explain the importance of...

Mice, bugs and hamsters are no longer the only way to study the brain. Functional MRI (fMRI) allows scientists to map brain activity in living, breathing, decision-making human beings. Read Montague gives an overview of how this...

In this video Paul Andersen explains how energy flows in ecosystems. Energy enters via producers through photosynthesis or chemosynthesis. Producers and consumers release the energy from food through cellular respiration. An...

Everyone eats, right? But how does that food get the energy to power you? In this episode of Crash Course Kids, Sabrina talks about the way energy moves, or flows, through an ecosystem and how that movement forms Food Chains! This first...

In this video Paul Andersen talks about the impacts of human growth on the environment and on themselves. The population, affluence, and destructive technology of a population impact the environment according to the IPAT equation. An...

We all know that the Earth is huge, but what is it made of? Join Jessi and Squeaks for a fun activity to learn about Earth's layers, and to make your own model of Earth!

We've already talked about how the Earth is divided into four spheres (The Hydrosphere, the Biosphere, the Geosphere, and the Atmosphere). But, how do these different sphere interact with each other? In this episode of Crash Course Kids,...

Tag along with Jessi and Squeaks to learn how to make your very own model of the Solar System!

New ReviewIn this math video lesson we will learn how to factor linear expressions using the greatest common factor (GCF) and rewrite expressions using parentheses, aligned to 7.EE.A.1. Viewers will be able to find the GCF of a linear expression...

New ReviewGuitar World's Pete Emery tests the Manson META Series MBM-2H Sustainiac - the latest version of Muse frontman, Matt Bellamy's affordable signature guitars.