for some not so old history of the topic:
http://harpers.org/archive/1958/09/the-coming-ice-age/1/
That seems to be one of the biggest differences, in bold, between 50+ years ago and today in science. The scientists were careful to label what we didn't know along with what they were hypothesizing when discussing the future.
BTW, the article is 8 pages long and worth the read.
Last edited: Mar 20, 2015