I stumbled across this site from one of those "/g/ acts like HN" threads a few months ago and it's quite funny. I think my favorite summaries so far are:

The Muskonauts figured out why their shit exploded. Hackernews, literally all of whom are actual rocket scientists, wonders if unit tests could have helped.

Russia addresses their worst nuclear contamination problem by putting a shed on it. Hackernews trades photos of the devastation and bitches about people getting paid money to work on the shed.

An astronaut has passed away. He retired from NASA in 1976, since which time humanity has been phoning it in with this whole space-travel scene. Half of Hackernews recognizes this as the massive failure it is; the other half seizes the opportunity to virtue-signal about all the other problems nobody's fixing.