History Articles

Image of Marian Anderson singing at Lincoln Memorial
American History

Sing Out for Justice — Marian Anderson

On Easter Sunday, April 9, 1939 African American contralto Marian Anderson performed an unprecedented open-air concert on the steps of the Lincoln Memorial. What she wore on that day illustrated that, despite stereotypes and obstacles, an African American woman could transcend entrenched social and cultural barriers to achieve fame, fortune, and success. […]

Image of ancient greek language carved in stone building
Ancient History

What Did the Ancient Greek Language Sound Like?

The Ancient Greek language is a language like no other. It records an astonishing array of great works in different genres, stretching across a thousand years of history. Watch lecture 1 from the series Greek 101: Learning an Ancient Language, and you’ll learn the 24 letters of the Greek alphabet using the restored classical pronunciation. […]


The Origins of Agriculture

Explore perhaps the most important revolution in the history of humanity, and even of our planet: the transition from foraging to agriculture. […]

Health and Fitness Articles


The Secret Life of a Virus

Viruses are tiny, tiny particles that are not visible by anything but the electron microscope. They are referred to as obligatory intracellular parasites because they […]

T-cells attacking cancer cell as part of the immune response in humans

The Immune Response

The immune response in a human’s immune system is remarkably complex, very efficient, and profoundly fascinating. Let’s investigate. There are many characteristics of the immune system […]

Robert Greenberg’s Music History Monday

Painting of Handel, King George, and several others on a boat, another boat with people in the background
Music Appreciation

Music History Monday: Water Music, Fiction and Facts

With all due respect to the twentieth century composer Benjamin Britain, Handel remains the most famous and beloved “English” composer in history, while Georg Ludwig, as King George I, founded a royal dynasty that lives on today in the form of George’s great-great-great-great-great-great granddaughter, Queen Elizabeth II. […]

Science Articles

Image of lightning and random number sequence for probability defined post

Our Random World—Probability Defined

While it’s nice to think that our challenge in life is to get rid of uncertainty and be in complete control of everything, that is not going to happen. One of life’s real challenges is to deal with the uncertain and the unknown in some sort of an effective way; and that is the realm of probability. […]

Building the Periodic Table

The periodic table is the chemist’s playground and an icon of science that’s found on science classroom walls by the millions all over the country, […]