Unless the freezing point of water has changed, the earlier period must have been warmer. Yet when we look on Hansen’s graphs, it appears that the period from 1900 to 1940 was much colder than the 1970s.

Data.GISS: GISS Surface Temperature Analysis: Analysis Graphs and Plots

It doesn’t matter how beautiful your theory is, it doesn’t matter how smart you are. If it doesn’t agree with experiment, it’s wrong. Richard P. Feynman

Hansen shows 1912 as being one of the coldest years on record, but people who were living at the time saw a world which was completely different from Hansen’s fantasy graphs.

19 Mar 1912 – CHANGE IN CLIMATE. “GREEN CHRISTMASES.”