Whats New - Feed: How long are they visible

Hello

I am stuck in the news Feed. I have placed the social pane on the account form. I have defined some rules and workflows, which fills the feed as requested. Perfect.

But...

1. How many records will be saved in the feed?
2. Do they disappear after 20 entries or after 30 days?
3. Is there a possibility to view them like other child records in a view?

Thank you

kind regards

Raffi