404. That’s an error.

The requested URL /bookmarks/mark?op=add&bkmk=https%3A//jeb.biologists.org/content/218/13/2067&title=Suppressed%20bone%20remodeling%20in%20black%20bears%20conserves%20energy%20and%20bone%20mass%20during%20hibernation was not found on this server. That’s all we know.