can i only get the alkien aktefact thing from destroying hives? or is there a other way? i only use natural evolution buildings..

Yes, if you're only playing with NE Buildings, then just Hives produce Artifacts.

IF you add NE Enemies or Bob's Enemies, then you can get Small Artifacts and group those together to make Artifacts.

hm i cant find it i play with other mods and natural evolution buildings.. but i cant find it.. how does it the building called? dont can play with the full natural evolutions mods im pretty new in this game :)

There is no "Artifact Farm" you need to collect them.
You can setup a kinda farm, by using "Thumpers" and calling biters to you and killing them.