Constant Wonder

Michelle Duster tells the story of her great-grandmother Ida B. Wells and her fight for racial equality. Rachel Wadham introduces winners of the Coretta Scott King Book Awards.

Martin Doyle sees American history through the eyes of the nation's rivers. Historian David Stradling of the University of Cincinnati describes the Cuyahoga River fire.

James Otis Smith shares the story of Black Wild West heroes whom history has largely forgotten about. Why did Silicon Valley take root in the Bay Area and not Boston?

Ed Douglas gives an overview of Himalayan history up to the present. Barbara Demick explores Tibet to see what modern life is like in a country that it famous for its defiance against China. Host Marcus Smith and producer Tennery Taylor discuss the Sundance Film Festival.

Harvard's Avi Loeb shares how an interstellar object named Oumuamua could actually be a piece of technology from intelligent life outside the solar system. Jill Tarter of the SETI Institute searches for extraterrestrial life.

Tobias Capwell is the Curator of Arms and Armour at the Wallace Collection in London and jousts semi-professionally. "In the Same Breath" and "Captains of Zaatari" from the Sundance Film Festival.

Rich Cohen shows the lengths that some parents will go to help their children reach youth hockey victory in Connecticut. Arnold Rosen shares the joy of being a Band Grandpa.

British historian Gareth Russell explains how six first-class passengers on the Titanic showcase the tensions of Edwardian society. Historian Douglas Smith separates myth from reality in the story of Rasputin.

Michael Butler Brown has recently documented the first known dwarf giraffes and is using it to increase awareness of declining giraffe populations. Producer Tennery Taylor discusses the new films at the Sundance Film Festival this year. Sharon Marcus reveals why we're so enamored of celebrities.

Claire McNear explains just how much work goes on to make the game show Jeopardy a reality. Author Mary Pilon reveals scandal in the history of the famous board game Monopoly. Karin Kjernsmo of the University of Bristol shares how animals use iridescence as camouflage.