Planning on printing the Thingiverse T Rex skeleton.
When I slicer a lot of the parts there are a number of unattached lines around the thin features that will just make a total mess of the part. Take a look at the attached image.

Is there a way to remove these?

I'm using Prusa slicer at the moment.

Are those unattached lines the bottom of support structures? If so then you could possibly change the support settings to have them all connect. You might need help from a Prusa Slicer expert...