Show latest notifications in Windows 8?
There is a way to show past notifications in Windows 8?
If for example I was away from keyboard for 30 minutes, I want to see what happened, in a glance.
Or I have to watch the "alert bubbles" in the start menu? (less immediate)
No
This is a much commented on quirk in Windows 8. It is currently not supported by the framework (notifications can be missed) and it has raised an immeasurable number of posts to various web boards.
AFAIK, Windows 8 doesn't have a unified notification center or something. So no notification history feature in Windows 8 as of yet.