History

Biological Anthropology—Unpacking Race and Biology

What does it mean to be human? Where did we come from? And what unites us in our diversity today? As the world population continues to explode, these big questions about humanity become increasingly important, and biological anthropology is the field of study that tackles them. […]

Image of Copmuter Code on Screen
Science

Computer Programming: Understanding Variables

The leap from traditional calculators to the power of computer programming begins when we turn to variables, operations with variables, and input/output commands. When we combine variables with other operations or input/output commands, we get statements that let the computer do virtually everything we regard as impressive. […]

Solar Eclipse
Astronomy

Eclipse Glasses Not Required

The Smithsonian Astrophysical Observatory has created a free Smithsonian Eclipse app, allowing users to watch a live NASA stream of the eclipse as it moves across the country. […]

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Physics

Big Mysteries: Extra Dimensions

Extra dimensions, which may well be an incorrect hypothesis, are one possible explanation for why gravity is so much weaker than the other forces.  In this video, Great Courses professor Dr. Don Lincoln explains it all with the help of a talking rabbit. […]

Physics

The Origin of Mass

Sophisticated consumers of science have heard that the Higgs boson is the origin of mass for ordinary matter. This is true, to a degree…  […]

Image of Roses
Science

Will Flowering Plants Take Over the World?

Flowering plants arrived relatively late in geological time, between 290 to 145 million years ago. But once here, they evolved quickly and often displaced many other types of plants. In fact, in terms of species, flowering plants are the dominant plant form on Earth today with more than 300,000 types. Learn how their unique reproductive mechanisms led to this explosion of speciation in such a relatively short time.
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Image of a tomato
Science

The Tomato—Fruit or Vegetable?

Go to any grocery store’s produce section and you will most likeley find tomatoes displayed among their vegetable friends. Yet in the world of botany, they’re actually considered berries. Why do tomatoes suffer from this produce identity crisis? […]

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