What does quantum mechanics tell us about our world -- or are there many worlds due to probability waves? How does the general theory of relativity mesh with quantum mechanics? If you've wished you understood quantum mechanics (or at least grasped the basics) physicist Brian Greene can help!

You may think you know who wrote the Declaration of Independence and what it says -- but do you really? Political theorist Danielle Allen looks at the document's origin and originators to give us a picture of the men and the moment in time that shaped the United States of today.

With the passing of renowned author and historian David McCullough, we revisit his 2014 Curiosity Retreats lecture — where he paints an extraordinary picture of the stories behind his novel “The Wright Brothers” and explores on a very personal level how the art of discovery was central to his life’s

Jason Silva is a positive futurist who wants us to be excited about "the adjacent possible" and the ways we need to embrace the coming technological changes -- the "tools" that will change us as a people and alter humankind.

How has Capitalism affected the world? Raj Sisodia, economic analyst, takes us back to pre-Industrial Revolution to show how our standard of living has improved. But now , he feels, it is time for another kind of capitalism - conscious capitalism - based on a value system deeper than profits.

Paul Saffo looks at the development of the US economy through the 20th and into the 21st century. What are the trends that have shaped the economy? How are innovations in technology and communications making the 21st century an entirely different landscape for producers and consumers?