Does anyone know any details about trolls? No, not the ones on the internet. The ones from Norse mythology. The only thing I know is that they differ in form from legend to legend. They are either hairy hunchbacked monsters that live in the mountains and hills, or giant humans that resemble the ogres and sometimes pillage villages.
Trolls are very popular souvenir items in Norway. I purchased a few when I was there.
They are common in Scandinavian folklore where they vary in size from dwarves to human sized, to giants.
They are ugly, and are said to turn to stone if they encounter sunlight, a feature they share with the dwarves of Norse myth.
This is why they live under the earth in caves.
They can be very dangerous if encountered, but they may be outwitted.
J. Simpson states that the word troll is very old and the meaning is obscure.
One possible meaning is that the word may mean spinning, or revolving.
Landmark features of the landscape are sometimes the doing of trolls; this is common in giant lore in general.
In modern Norway, trolls with tails that are sold to tourists are said to be girl trolls.
Big hairy ones are mountain trolls.
In one translation of the Edda that i have, the word troll is used to describe the giants of Jotunheim
that Thor battles. So I suppose the word can have a certain amount of flexibility.