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• Feature

  Tunnel vision: how an obsessed explorer found and lost the world's oldest subway

  Bob Diamond rediscovered a long-lost subway beneath Brooklyn in 1980, and went on to lead tours of it for 30 years after. But in 2010, New York City revoked his access — and he doesn't want to go down without a fight.

• Report

  The coin prince: inside Bitcoin's first big money-laundering scandal

  Charlie Shrem's Bitcoin payments startup, BitInstant, was a success from its start back in 2011. But laws have changed since then, and last week Shrem was arrested on money laundering charges that could kick off Bitcoin's first big regulatory trial.

• Review

  This just in: Paper is the best Facebook app ever

  Facebook wants to act quickly and boldly and try innovative new things — but that's hard work when there are well over a billion users who it might confuse, lose, or anger. Instead, it launched a brand new style of Facebook app this week that people only have to use if they want to. And this time, they'll probably want to.

• Report

  Freezing Sochi: how Russia turned a subtropical beach into a Winter Olympics wonderland

  Russia has had seven years to get Sochi ready for the winter Olympics, and that's meant everything from building infrastructure to preparing for the weather: not only is Sochi fairly warm, but climate change has been making it increasingly tricky for many northern cities to host the games.

• Report

  Carl Icahn 2.0: an icon of '80s greed is back to shake up Silicon Valley

  Carl Icahn has been making headlines lately for his aggressive investments in Apple, Netflix, Dell, and other tech giants. But it's hardly new behavior for him: Icahn is a well-known "activist investor," and now he's back with a bigger cash backing than ever before.

• Report & Gallery

  The punk-rock spirit of Pussy Riot comes to America

  After being released from Russian prison in December, Nadezhda Tolokonnikova and Maria Alyokhina of the punk collective Pussy Riot have made their way to New York City. Earlier this week, the duo led a benefit concert in Brooklyn to speak out about oppression under Putin.

• Report

  Grim, broken, and grand: the mad world of 'DayZ'

  DayZ has no goals, is filled with glitches, and isn't even finished. Yet that's somehow made for one of the most compelling games ever — one that's freeing, thrilling, and downright haunting.

• Review

  Lenovo Yoga 2 Pro review

  Lenovo made one of the first ultrabooks to really take advantage of Windows 8, and now it's back with a successor. The Yoga 2 Pro can transform into four different modes stretching from laptop to tablet: is any one of them good enough to make Lenovo's new Yoga worth picking up?

• Report

  How the father of 'Saturday Night Live' conquered the rest of the week

  Jay Leno is leaving The Tonight Show again, and this time it ought to be for good. That isn't because Jimmy Fallon is a shoo-in as his successor — it's because SNL creator Lorne Michaels will have his back.

• Report

  Ctrl, Alt, Nadella: can Microsoft’s new CEO reboot the software giant?

  Microsoft's new CEO has a lot on his plate. After being selected as the third chief executive in the company's history this week, Satya Nadella laid out his strategy for the future — one dominated by mobile and the cloud. That may not sound revolutionary, but it could mean big changes in Redmond.