Bones, you probably have them and they're for more than holding your body upright.

In this video Paul Andersen explains how the mechanical energy added or removed from a system results from work. For work to occur a force must act parallel to the displacement of the system. Since work and energy are equivalent the...

Paul Andersen explains the importance of biodiversity. He starts by describing how biodiversity can be species, genetic or ecosystem diversity. He explains the importance of keystone species in an environment and gives two examples;...

How DO you make a digital clock?

The Arab-Israeli Conflict, which is the ongoing political tensions and military conflicts between Arab nations and Israel, is one of the longest and most complex disputes in the world. Today, we're going to focus on more recent events,...

In this video Paul Andersen explains how various techniques have been used for years to collect seafood. Commercial fishing has led to overfishing in certain areas and species due to the tragedy of the commons. An explanation of...

Ever wonder why the earth has different seasons? Michael Aranda will explain in this episode of SciShow Quick Questions.

So, we've been putting off a kind of basic question here. What is money? What is currency? How are the two different. Well, not to give away too much, but money has a few basic functions. It acts as a store of value, a medium of...

Dr. Ellen Ochoa is incredible! She published over a dozen papers, co-filed three patents, and was a NASA engineer, all before becoming an astronaut and spending nearly a thousand hours in space.

Mr. Andersen introduces the topic of electricity. He differentiates between static electricity and current electricity. An introduction to electric circuits is also included.

Ethanol: this molecule, made of little more than a few carbon atoms, is responsible for drunkenness. Often simply referred to as alcohol, ethanol is the active ingredient in alcoholic beverages. So how exactly does it cause drunkenness,...

In this video Paul Andersen explains how the atmosphere surrounds the planet. The state of the atmosphere is climate and is affected by unequal heating, the Coriolis Effect, and the ocean. Convection cells and ENSO are discussed in...

In this video Paul Andersen explains how electromagnetic induction occurs when the magnetic flux of an object changes. The magnetic flux is product of the surface area perpendicular to the magnetic field and the magnetic field strength....

In this video Paul Andersen describes the major parts of an atom and explains how the Bohr Model more accurately represents the location of electrons around the nucleus. Niels Bohr refined the Rutherford model to account for spectra.

So, during times of inflation or deflation, why doesn't the government just set prices? It sounds reasonable, but price ceilings or floors just don't work. Adriene and Jacob explain why. Subsidies, however, are a little different, and...

In this video Paul Andersen explains how constructive and destructive interference can create interference patterns. Interference patterns can be created by all types of waves, including water, sound, and light. A classic experiment...

In this video Paul Andersen explains how the boundary between the system and environment is chosen to simplify analysis of a physics problem.

In this video Paul Andersen explains how to write out the electron configuration for atoms on the periodic table. More importantly he shows you why electrons arrange themselves in shells, subshells and orbitals by using Coulomb's law...

The human eye is an amazing mechanism, able to detect anywhere from a few photons to a few quadrillion, or switch focus from the screen in front of you to the distant horizon in a third of a second. How did these complex structures...

Mr. Andersen defines the terms energy, work and power. He also uses a simple example to calculate both work and power.

Paul Andersen explains three major nuclear processes; fusion, fission, and decay. He begins with a brief discussion of the four fundamental forces in nature. He the explains how nuclei can be combined in fusion, divided through...

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...

The concepts of work and power help us unlock and understand many of the physical laws that govern our universe. In this Lesson, Peter Bohacek explores the interplay of each concept when applied to two common objects---a lightbulb and a...

GPS devices aren't just for keeping you from driving into a lake. They're also helping lots of scientists in unexpected ways.