Marissa Mayer says government should let tech companies be more transparent on FISA requests

The company goes berserk and snaps up two start-ups in a single day

Changes to Yahoo's web-based email include scans of users' emails, in order to allow for better-targeted advertisements

Facebook, Google, Microsoft, Twitter and Yahoo all complain about threats posed by the Communications Data Bill

BT announces plans to switch from Yahoo Mail To BT Mail as part of new content offering

The company looks desperate to get its hands on an established video platform

Github users show how to take advantage of Yahoo's big offer and store non-photo files on Flickr

Several thousand Tumblr blogs have jumped ship but that's a small fraction of its 100 million users

Yahoo admits a hack of its infrastructure, although passwords remain safe

Tumblr's 100 million users could be just what Yahoo needs to look young and fresh