The prognosticators of doom for traditional newspapers are everywhere and it's hard to argue with them. But for more than a decade, Matthew Watkins has been part of a new model of non-profit journalism at The Texas Tribune as editor in chief.

Two-hundred and fifty years ago, patriots gathered in Philadelphia declared America's independence from England. Former U.S. ambassador David McKean and historian M. Todd Bennett explore the celebrations that have followed every 50 years since, revealing the enduring challenges and promise of the American republic.

Thomas Jefferson and Alexander Hamilton stand astride the core debates in American history from neutrality to civil rights and beyond. New York Times bestselling author and constitutional scholar Jeffrey Rosen traces that history, the rise and falls of each man's reputation, and the enduring questions they asked about power, the citizen, and the American state.

Whether it's the existence of God, UFOs, or the nature of consciousness, we all grapple with mysteries of the universe. Where some find answers in religious faith, New York Times bestselling science writer Michael Shermer challenges people to demand answers rooted in science and skepticism.