Pre-1900
As early as the 16th century, many prominent people correctly believed that the North Pole was in a sea, which in the 19th century wa… See more

The sun at the North Pole is continuously above the horizon during the summer and continuously … See more

In most places on Earth, local time is determined by longitude, such that the time of day is more or less synchronised to the position of the Sun in the sky (for example, at midday, t… See more