Yesterday was a big day for Twitter, who announced new functionality that will allow you to email tweets and some improvements to Twitter search. Some of these features have also been added to the latest builds of their official iPhone and Android apps, which are available to download now.

Twitter unveiled the changes on their official blog.

See headlines and photos: Now you can preview photos and article summaries without a tap in Discover and search results. This new design for mobile brings the content of each Tweet front and center, so you can easily enjoy the view.

Discover popular Tweets: Find out what’s popular among the people you’re connected to in a simple stream of Tweets, like Discover on twitter.com. Just tap “View all Tweets” to see a continuous stream of news, photos and other stories shared by the people in your network.

Search for a new perspective: In search, photos from relevant results also appear right at the top of the stream so you can see what’s happening from multiple perspectives. You can also understand what’s resonating in your network with context like who favorited a Tweet.

You can grab the new apps here.

(Source: Twitter blog.)