Tim Wu at Columbia Law School speculates that video-hosting services may one day ask committees of users to decide whether to allow sensitive footage to be shown in their countries.

ECONOMIST: Internet freedom

Tim Wu, an internet expert at Columbia Law School in New York, says sites like YouTube face huge problems if they wield editorial power, and huge problems if they don't.

ECONOMIST: Censorship and the internet

It takes about four weeks for a skin cell to be "primed" for reprogramming, and then it takes an additional three to four weeks for iPS colonies to grow, according to Dr. Joseph Wu, study co-author and assistant professor of cardiology and radiology at Stanford's School of Medicine.

CNN: Study: Human fat yields multipurpose stem cells

The hilarious, no-holds-barred mind behind Kevjumba is Kevin Wu, now 21, who started building this celebrity from his Texas home while still in high school.

FORBES: Meet Kevjumba: Alleged Bear Wrestler, Bonafide YouTube Star