Pipe organs have a storied history throughout Western civilization, but demand for the king of instruments has seen a steady decline in recent decades. Special correspondent Fred de Sam Lazaro reports on one attempt to change that. It's...

A new method of treating tooth decay using silver nitrate may make the <br/>
pain, and expense, of traditional treatments obsolet<br/>e. Special
correspondent Cat Wise has the story.

Nearly one in five people infected with HIV globally lives in South Africa, and only half of those individuals are on treatment. But the nation has made major strides against the virus in recent years and now is aggressively moving to...

The epicenter of the AIDS epidemic in America is Atlanta and the southeast, and among the hardest hit populations are gay and bisexual black men. According to the CDC, half of them will be diagnosed with HIV in their lifetimes if current...

Jeffrey Brown looks at the newly-opened National Underground Railroad Freedom Center, which chronicles the struggle of slaves seeking freedom in pre-Civil War America.

In the rural South, poverty, prejudice and lack of health care are exacerbating the spread of HIV, making it the epicenter of HIV/AIDS in America. William Brangham and Jason Kane, along with Jon Cohen of Science magazine, meet some who...

Record-breaking drought continues to scorch wide swaths of sub-Saharan Africa, from Somalia in the east to Niger in the west. Humanitarian groups say tens of millions are hungry and conditions are being made even worse by the...

Today we’re going to step back from hardware and software, and take a closer look at how the backdrop of the cold war and space race and the rise of consumerism and globalization brought us from huge, expensive codebreaking machines in...

This video is about how efficient various reactions are at converting mass to energy (as we know from the Einstein mass-energy equivalence of E=mc^2). Antimatter is very efficient but it is not...

Scientists know that the Y chromosome has been shrinking in size over millions of years, but recent studies suggest that it has more important genes, besides the ones that cause biological maleness.

We’ve had a number of false starts that did more harm than good to figure out new treatments, and ECT is one of those treatments that came from a complicated history.

Dr. Orion Berryman talks with Hank about the cool chemistry going on in his lab, and Jessi from Animal Wonders brings in Prickle the Hedgehog!

Can Batteries Power Everything? This video is about the physical and chemical limitations to electrolytic batteries, and how we might surpass the energy density and specific energy of lithium-ion...

You've always been told that pi is 3.14. This is true, but this number is based on how we measure distance. Find out what happens to pi when we change the way we measure distance.

Your team has developed a probe to study an alien monolith. It needs protective coatings — in red, purple and green — to cope with the environments it passes through. Can you figure out how to apply the colors so the probe survives the...

What is Pick's Theorem and how can we prove it?

The placebo effect is an unexplained phenomenon wherein drugs, treatments, and therapies that aren't supposed to have an effect -- and are often fake -- miraculously make people feel better. What's going on? Emma Bryce dives into the...

Cartoons are the best! But you know the characters in them aren't real... so how do they move around like that? Today's experiment will teach you all about the different illusions animation uses to trick your brain and bring drawings to...

How is it that Beethoven, who is celebrated as one of the most significant composers of all time, wrote many of his most beloved songs while going deaf? The answer lies in the math behind his music. Natalya St. Clair employs the...

The pandemic brought into sharp focus the crisis in caregiving in the United States, which woefully under provides support for parents. Activist and Girls Who Code founder Reshma Saujani has a proposal to address that -- something she...

It's a question that entails some risks: What does polar bear milk taste like, and why does it taste that way?

Townspeople are demanding that a corrupt merchant's collection of 30 rubies be confiscated to reimburse the victims of his schemes. The king announces that the fine will be determined through a game of wits between the merchant and the...

The Earth is 4.6 billion years old -- but how can humans relate to a number so colossal, and where do we fit on the geologic timeline? Comparing the Earth's lifetime to one calendar year, events like the extinction of dinosaurs and...

Why do we sleep? We spend a third of our lives in slumber, but science has yet to determine exactly why we have do it. Here's a look at how sleep works, why we're not getting enough sleep, what happens if you DON'T sleep, and an idea...