Niagara Falls and climate change
This photo of the Niagara Falls was taken just over 100 years ago, in 1911. Has anyone seen anything like it recently? Will we ever see its like again?
Niagara Falls in 1911
Hat-tip to Nourishing Obscurity, where there are more pictures of the same event.
Notes from underground 
Pah! You’ll be telling me that the Thames used to freeze at London next!
http://www.dailymail.co.uk/news/article-1241292/And-think-cold–great-chills-history-left-Thames-frozen-snow-piled-rooftops.html
The Thames? And it will again, Chris.