https://youtube.com/watch?v=-pU3lfz2xN8The starry night sky seems remarkably distant from the topic of air conditioning, but it’s revolutionizing the field in quite an unexpected way. In this episode of "The Spark," watch how scientists from across the globe are harnessing natural...

https://youtube.com/watch?v=iFTToTsJuY0Intelligent, indestructible and with no humans on board, these sailboats are plotting their own course through the waters of San Francisco Bay. If Richard Jenkins gets his way, soon there’ll be hundreds of them – trawling the oceans for...

https://youtube.com/watch?v=DKbRL6OpifgThe Dutch capital Amsterdam is widely known for being bike-friendly. But it wasn’t always a model cycling city. Public outrage at rising traffic casualties in the Seventies caused city planners to rethink their approach to urban design. Video by...