This flow of electric charge is called a current. Some metals are much better at conducting electricity than others. Copper is a very good conductor. And so is aluminium. Whereas stainless steel ...

Andres Orozco-Estrada is one of the most exciting conductors around. The Colombian has garnered rave reviews for his exuberance and his ability to connect with musicians and concertgoers.

But these days, some of the world's most innovative orchestra conductors come from Latin America ... (SOUNDBITE OF MUSIC) OTIS: In 1997, he was accepted into the top conducting school in Vienna, ...