Join us this week as WorldBeat checks in with Lars Ulrich of Metallica, Chuck D. and Chapman, plus Slipknot, Rage Against the Machine and Stone Temple Pilots to get their take on new digital music technologies.

CNN: Artists differ on Internet music distribution

This notion was revived in the 1950s, when the building of a genuine chess-playing machine was seen by artificial-intelligence researchers as a stepping-stone towards a general theory of machine intelligence.

ECONOMIST: Computers and chess