It's not so rare for older but well-written articles to show up multiple times on the HN frontpage.
It's somewhat rarer for a 'product' such as Sci-hub to show up multiple times, but considering that the HN crowd is pretty proud about Sci-hub's existence and will readily strike up a conversation about the Evil Publisher Empire, it's not so strange to see it on top.
It's somewhat rarer for a 'product' such as Sci-hub to show up multiple times, but considering that the HN crowd is pretty proud about Sci-hub's existence and will readily strike up a conversation about the Evil Publisher Empire, it's not so strange to see it on top.