The evolution of the podcast
Initially, podcasting was called 'audioblogging
The first podcast, it is generally agreed, was Internet Talk Radio, a 1993 show launched by technologist and writer Carl Malamud. A decade later, the first podcast to gain widespread popularity was launched by former NPR host Christopher Lydon, who posted interviews with politicians and tech-industry figures to his website
In 2004, the term 'podcast' entered widespread use. By the middle of the year, the number of successful Google 'hits' for the word podcast was doubling every several days. By The following summer, Apple added a podcast directory to its iTunes service. The revolution had begun.
In 2006, comedian Ricky Gervais (left) became a early celebrity adapter of the medium, with his Ricky Gervais Show - receiving some 4.5 million downloads. Where he went,Others soon followed..
Last year, Serial broke records as the world's most-listened-to podcast. This chronicling of a high-profile Baltimore, USA murder trial and its aftermath gripped listeners around the globe.
A second season is to be broadcast later this year.