Beyond the last 20 years, when was the last era when the North Pole had expanses of unfrozen water?
In the summer of 2000, a Harvard oceanographer saw a mile-wide stretch of open ocean at the North Pole and informed the New York Times, which ran a front-page article claiming that the "last time scientists can be certain the pole was awash in water was more than 50 million years ago." The Associated Press and other media outlets quickly spread this story before the Times issued a correction stating that it "misstated the normal conditions of the sea ice" and that "a clear spot has probably opened at the pole before." In reality, such expanses have been documented via reports and pictures (see the link below) ever since the 1950s when mankind developed the technology to visit the North Pole during the summer. With total disregard for these facts, a slew of media outlets reported in July 2013 that a "lake" formed at the North Pole due to "unprecedented melting."