Is Yahoo buying Foursquare for $900 million?
Tumblr outdoes Facebook and YouTube to become the fastest-growing social media platform: Report
Yahoo's Marissa Mayer plans to make Tumblr the new YouTube: Report
Facebook still reigns among US teens: researchers
Yahoo planning YouTube rival
Google, Kickstarter among winners of 2014 Webby awards
Tumblr boosts up security with two-step authentication
New Tumblr tool lets you link people's profiles in posts
Anonymous Tumblr account criticizes Apple iOS 7 design flaws
Facebook integrates Home with Instagram, Tumblr, Pinterest and Flickr
Yahoo to focus on developing mobile Internet apps
Yahoo promises not to screw up Tumblr, CEO David Karp says "Fuck Yeah"
Yahoo acquires Tumblr for approximately $1.1 billion, will let it run independently
Yahoo board approves $1.1 billion Tumblr acquisition: Report