Book: Back to Work: Why We Need Smart Government for a Strong Economy

Jim Lehrer interviews American diplomat Paul Nitze on his views of the Soviet Union.

The demand for electric vehicles is surging in the U.S., sparked in part by the Biden administration’s Inflation Reduction Act and the subsidies it offers. But a looming supply shortage of lithium threatens to stall the EV transition....

Afghan security forces are strained to the limit and unable to stop rampant violence fracturing the country, as fighting has intensified between government forces and the Taliban. With the U.S. preparing to withdraw its troops, warlords...

Extraordinary violence is among the factors pushing Central Americans north toward the U.S. In El Salvador, rival gangs like MS-13 and the 18th Street Gang kill thousands per year, despite a harsh crackdown by law enforcement. Special...

In this video Paul Andersen explains how scientists analyze data and evaluate evidence. He starts with a description of data and how it must be properly displayed. He then describes types of data in each of the four big ideas. He finally...

Derivatives are about slope, and integration is about area. These ideas seem completely different, so why are they inverses?

In this video Paul Andersen explains how the amplitude of a wave is a measure of the energy of the wave. He gives several examples of wave amplitude and shows you how to calculate the wave of a transverse and longitudinal wave.

The cross product is a way to multiple to vectors in 3d. This video shows how to visualize what it means.

We’ve been studying the body for most of human history, and yet we are still finding new organs (or parts of them - depending on your definition). Also, thanks to some marmosets, we know a little more about how anxiety and depression...

In this video Paul Andersen explains how the Earth's climate will natural change due to interactions between the Sun and Earth, volcanism, and plate tectonics. Species may go extinct leading to adaptive radiation or may move to a...

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.

Usually when we think about animals and disease, we think about illnesses that they transmit to us - like swine flu or Lyme disease. But illness is often a two-way street, and while animals can pass pathogens to us, we can also pass our...

Do other planets have weather? It turns out that, yes, they do! But, the weather isn't all the same on other planets because of things like atmosphere. In this episode of Crash Course Kids, Sabrina takes us on a tour of the weather on...

The cross product is a way to multiple to vectors in 3d. This video shows how to visualize what it means.

How does math keep a folded slice from drooping? And what does pizza have to do with the speed of light?

Thanks to climate change, many regions are experiencing longer and more dangerous wildfire seasons. Here are 4 high-tech ways we are trying to stop these fires in there tracks, as well as one that’s a bit simpler.

What's so special about Leonard da Vinci's Vitruvian Man? With arms outstretched, the man fills the irreconcilable spaces of a circle and a square -- symbolizing the Renaissance-era belief in the mutable nature of humankind. James Earle...

In 1901, David Hänig published research that led to what we know today as the taste map: an illustration that divides the tongue into four separate areas. It has since been published in textbooks and newspapers. There is just one...

Humans have been battling heartburn for hundreds, if not thousands, of years. But recently the incidence has risen, making it a common complaint worldwide. What causes this problem, and how can it be stopped? Rusha Modi details the...

What is integration? Why is it computed as the opposite of differentiation? What is the fundamental theorem of calculus?

Scientists have discovered an underground lake of liquid water on Mars! While this isn’t itself evidence for life on Mars, it does raise some new possibilities.

What weird worlds are these video games creating?

Recent proof-of-concept studies showed that researchers were able to survey animals in an area simply by vacuuming up DNA in the air.