2 ms·
Earth may have had a ring system 466M years ago
- gnabgib 2y agoDiscussions (127 points, 2 months ago, 49 comments) https://news.ycombinator.com/item?id=41756346 https://news.ycombinator.com/item?id=41756346 (54 points, 3 months ago, 26 comments) https://news.ycombinator.com/item?id=41555349 https://news.ycombinator.com/item?id=41555349