These are graptolites:
(and I don't know more about them than the name ... I am not a palaeontologist ;))
We visited the 'elg' people:
And now the rock carvings which make clear why 'elg' (moose) people:
Another series of pictures from Oslo - I played tour guide for an Australian friend last summer. This was almost a year ago, lol, I am so up-to-date ;)
Ornaments on a viking ship in the famous viking ship museum: