There have also been stories in various other places (35,000 according to Demis Hassabis), including:
Wired online: In two moves AlphaGo and Lee Sedol refdefined the future,
American Go Ejournal - Game Over? AlphaGo Beats Pro 5-0 in Major AI Advance,
Bloomberg, The Economic Times (India), Fortune, Science, USA Today, ZDNet and a Smithsonian publication.