A while back in a column I wrote, I used the theory of global warming as an example of

the unfalsifiable theory: the Procrustean bed, named after that unpleasant fellow of legend, Procrustes, whose joy it was to waylay travelers and tie them to his bed, which was truly one-size-fits-all. If the traveler were too short, he was stretched till he “fit,” and if he were too tall, his dangling appendages were lopped off (an apt description of what the proponents of an unfalsifiable theory do to facts).

My reason for selecting global warming as an example was because “global warming theorists’ readily [accept] as proof of their theory any proposed meteorological event, including global cooling.” Here’s a very recent example of that tendency. Not only do melting polar ice caps show evidence of global warming, but also, according to the Palm Beach Post: Antarctica ice cap growing, another sign of warming