TIL That there's a name for when you've just learned something, only to have it come up later out of the blue, or what some call serendipity

http://en.wikipedia.org/wiki/Baader-Meinhof_phenomenon

https://www.reddit.com/r/todayilearned/comments/152djz3/til_that_theres_a_name_for_when_youve_just/