What reporting was Nellie known for?

Nellie Bly, an American journalist, was known for her pioneering investigative reporting, particularly her undercover work. She famously faked insanity to expose the horrific conditions of the Women's Lunatic Asylum on Blackwell's Island in 1887. Additionally, she gained fame for her record-setting trip around the world in 72 days, which she undertook to challenge Jules Verne's fictional character Phileas Fogg. Bly's work helped revolutionize journalism by emphasizing the importance of in-depth reporting and social reform.