50 Things That Made the Modern Economy - Oil
The price of oil is arguably the most important in the world economy. How did we become so dependent - and are we ever likely to wean ourselves off it?
30 Animals That Made Us Smarter - Dolphin and tsunami detector
The way dolphins communicate is being studied to create tsunami early warning systems. They produce click sounds to help navigate and hunt for prey. They listen back to the echoes to help create a 3D image and visualise their surroundings.
www.bbcworldservice.com/30animals
With Patrick Aryee.
#30Animals
Curious City - The Cha-Cha Slide And More: Which Dances Were Invented In Chicago?
Don your dancing shoes as we track down the Chicago band members, musicians, and dancers who helped create five iconic moves.Â