Yes, there is a way. Bookmark the thread, leave it a week or so, and then read the thread normally because there won't be any new comments anymore. Certainly it's not the end of the world if you leave a thread to mature.
The length of the whole canal is 200km and it took 10 years to build. I don't claim that it's exactly linear, but it sounds reasonable to assume a few weeks for just a 1km segment. The soil is soft and the canal isn't deep.
Yeah, race highlights are never 23 mins long so that was probably a screw up. And maybe a copyright takedown allows them to have all other such 23 min reuploaded videos automatically removed?
I didn't read the paper, but if they can measure its orbital eccentricity, they can see if it's gravitationally bound to that star. Like they did with ʻOumuamua.