FYI HN recently added a "past" link that takes you to previous discussions.
Re:Capacitance Electronic Disc
by Dylan16807 on Sunday November 22, 2015 @10:58AM
(#10610411)
That's a nice idea, but it doesn't say until you click whether there are any previous discussions. Better to have someone point out the uncommon case where there's something interesting.
https://news.ycombinator.com/item?id=10364797