Php css help

Hey All,
I’m having a problem figuring out how to re-create a part of this site:

On the left colum it looks like it is updated regularly with text and photos, but it is only a summary, then when you click read more it expands and the whole text is there?

What is this called and how would you go about doing it? I also like how the newest is on top and everything uses the same css.

Please advise, thanks!