Source: When somebody hits you with that new IPCC is 95% certain talking point on global warming, show them this,
by Anthony Watts, with h/t to Burt Rutan and Warren Meyer.
WUWT, August 20, 2013.

 

    Two graphs of global temperatures for half-century periods, but can you tell which is 1895-1946 and which is 1957-2008?
(click graphs to enlarge)