A data breach at JP Morgan Chase and six other institutions caused 83 million accounts to be compromised.
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A Neptune-sized exomoon became the first one discovered outside the Solar System.
The last Prince of Wales, Dafydd ap Gruffudd, was the first person recorded to have been hanged, drawn, and quartered.
The Kingdom of Iraq won its independence from the United Kingdom.
The world's longest treasure hunt ended after 31 years.
Author Edgar Allan Poe was last seen alive. He was disorientated, lying in a gutter in Baltimore, Maryland, US.
