Twitter is testing an expandable timeline that allows users to see media and related information inside the timeline instead of in the sidebar.
The redesigned timeline allows users to click on individual tweets to expand conversations, media, and retweets.
Hovering over a tweet produces an “Open” link that allows users to open a tweet to see who retweeted the message, as well as view the entire conversation thread. Opening a tweet with media such as a TwitPic image or YouTube video will expand the window in the timeline to view the media.
Twitter hasn’t yet commented about the changes on its official feed. Have you received the new Twitter Timeline?