Sometimes we choose dogs — and sometimes they choose us. A scruffy, yellow Ecuadorean street dog followed a team of Swedish trekkers on a race through the Amazon. He became the star of the race and ended up becoming the trusty companion to the team's captain.
Grand juries decided not indict the police officers who killed Michael Brown and Eric Garner. The decision enraged many Americans, who questioned why the incidents didn't deserve an open trial — exactly the reason why the UK, the originator of grand juries, abolished its own system long ago.
The new NOVA special, "Vaccines: Calling the Shots," explores the lingering global resistance to vaccination campaigns. Case studies from around the world explain just how bad the impact can be when groups opt out of childhood shots.
David Tennant is already famous in the United Kingdom for his performance on Doctor Who, a long-running BBC sci-fi show. Now he's made history on another popular British program of a very different kind.
Nikola Tesla was a visionary and a recluse with a genius for invention. He's also a hero in Serbia, where an author has created a new fictional account of Tesla's incredible life and many achievements.
The film The Imitation Game has cast new light on the figure of Alan Turing and the work done at Bletchley Park during World War II. Many of the greatest minds who worked at the secret location were woman who, after the war, returned to their lives without ever telling anyone about the work that they did.
Seventy-five years ago this week, the world was turned upside down when Hitler and Stalin signed a pact of alliance. Within days Hitler invaded Poland, starting World War II. Roger Moorhouse, a historian, has a new book out on the momentous but often-forgotten "Devils' Alliance."