What happens to old twitter posts?

Factual Questions
1

It takes a lot of patience to scroll back more than a few days on a busy twitter account. For example Kirstie Alley cranks out thirty or more tweets a day. Plus she retweets a lot too.

What if you wanted to see tweets from a year ago? Are they just gone? Is there an archive?

2

Moved Cafe Society --> GQ.

3

The Library of Congress is archiving every single tweet ever.

4

Whew, I was worried Kirstie’s thoughts might get lost.