TC Roundup: Facebook takes heat for secret study; Sheryl Sandberg apologizes

Facebook takes heat for secret study; Sheryl Sandberg apologizes: That was the response of Facebook's Sheryl Sandberg, who for the first time publicly addressed the raging firestorm about the secret study conducted on 700,000 unknowing users by injecting their feeds with negative information to see if it made them feel, like, sad. (VentureBeat)

Google launches third-party Android Wear apps: Google is continuing the momentum it started at last week's Google I/O developer event. After rolling out Google Play Services 5.0 worldwide on Wednesday, the company followed up with the first batch of third-party apps for Android Wear smartwatches. The list of applications appears to be rolling out in a staged fashion as some Android owners are seeing different titles. (GigaOm)

Facebook acquires video ad company LiveRail: Facebook Inc is acquiring video advertising company LiveRail in the Internet social network's latest step to make video ads a bigger part of its business. (Reuters)