If you really want to know how many time it has been posted, HN links to "from" tab when you click the site in the parentheses instead of the title: https://news.ycombinator.com/from?site=explainshell.com

I wish I could upvote this comment much more!

I came here to ask exactly the same question. I can only assume that entertainment activities (console gaming, video on demand, etc.) can bring the traffic to make such a difference.

Video recordings are from FOSDEM 2017 which took place in Brussels, Belgium on 5-6 Feb 2017. High quality talks, at least on data engineering field.

The discussion in HN around the same article 7 months ago: https://news.ycombinator.com/item?id=9290271

RadioLab has also produced a podcast on changing the nature/behaviour. The third story is about the soviet experiments on red fox domestication: http://www.radiolab.org/story/update-new-normal/