Ronald Heifetz founded the Center for Public Leadership and is the King Hussein bin Talal Senior Lecturer in Public Leadership at Harvard Kennedy School. Heifetz speaks extensively and advises heads of governments, businesses,...

The Expeditions in Computing awards tackle some of the most challenging computing and information science and engineering issues today. See some of the research being carried out by Expeditions in Computing awardees in this...

Sold into slavery by her parents, Polly Bemis faced discrimination as a Chinese immigant in America – but became something of a pioneer of the West.

Putting the "wild" into Wild West, prostitution was big business in frontier communities – and gave the so-called "soiled doves" who controlled the industry wealth and influence as America grew.

Exposure to ultraviolet rays may increase biodiversity of the gut microbiome in humans.

In this eight-part series, Bill Janeway investigates the relationship between #venturecapital​ and technological #innovation​, and the interdependent roles of entrepreneurial firms, the mission-driven State and financial speculation in...

View "Beyond Einstein: Part I" at:Albert Einstein's theories rank among humanity's greatest achievements. They sparked the scientific revolution of the 20th Century. In their attempts to understand how space, time and matter are...

Neil Oliver visits the Wall - a massive statement of the power of the Roman Empire. Neil looks at recent discoveries which uncover the lives of the people who built and lived along the wall.

Wild West saloons have been portrayed in popular culture as dens of vice and violence. Located throughout the American frontier, Western saloons were part of the landscape, present in small camps and growing towns alike. Saloons in the...

What were the characteristics of the wall? What else was created along the wall? How was the wall patrolled?<br/>
Hadrians Wall, Part 2

Alaska became the 49th state to join the United States in 1959. Far removed from the contiguous US, Alaska remains the "last frontier" in many ways - including in the kitchen.

In this video I explain how the production possibilities curve shifts when there is a change in resources or a change in technology. Understanding the general concept will help you understand the idea of economic growth, but keep in mind...

Mr. Clifford's 60 second explanation of Constant and Increasing Opportunity Cost.

John F. Kennedy's presidency was a turning point in American history, both in terms of what he represented, as well as his assassination, which shocked the world. In many ways, America never recovered, and would never find the optimism...

How does innovation come about? Along the entire “innovation chain” — from research and development, to production and commercialization — government and private sectors have very different roles to play. On China’s part, providing...

In this mini lesson, Mr. P./Marc delves into five different subordinating conjunctions: after, as, although, because and before. A conjunction is a word that joins two parts of a sentence to make one. A subordinating one joins...

Learn more about the Tejanos and the Texas Revolution.

When you think of American tough guys, who springs to mind? Probably not the President. But two-term Commander-in-Chief Teddy Roosevelt was hard as nails.

John F. Kennedy's presidency was a turning point in American history, both in terms of what he represented, as well as his assassination, which shocked the world. In many ways, America never recovered, and would never find the optimism...

Just the Facts: The Emergence of Modern America: The Gilded Age uses fascinating historical footage to explore six decades that shaped modern America. The series examines the Gilded Age in the late 19th century, the Progressive Era of...

Discusses the French trading networks, their alliances with Native Americans, and their conflicts with settlers. This video looks at how the French nobility tried to govern New France and how this structure reflected the old country....

Nouns in Spanish can be masculine or feminine. Learn which articles should be used in front of masculine and which should be used with feminine nouns.

Just the Facts: The Emergence of Modern America: The Gilded Age uses fascinating historical footage to explore six decades that shaped modern America. The series examines the Gilded Age in the late 19th century, the Progressive Era of...

Three astronauts aboard China’s space station mission have had their return to Earth delayed after their return capsule was reportedly struck by orbital debris, forcing China Manned Space Agency to launch an urgent inspection and...