Been hearing about the possibility of this since 1999 or there about when it was covered at a university lecture. Then there was the movie: https://en.wikipedia.org/wiki/The_Day_After_Tomorrow Like global warming, it is regularly predicted and in some ways we become immune to the predictions because it is on such a long time scale compared to our attention.

Humans do not do well with long-term threats in which we have to make everyday sacrifices. We do better with long-term threats that are clear economic opportunities, such as buying better airport scanners and the like, something the sales guys can really sink their teeth into.