On the 6th of April, 1909 American explorer Robert Peary (6th May, 1856 - 20th February, 1920) and his associate Matthew Henson (8th August, 1866 - 9th March, 1955) claimed they had become the first party to reach the North Pole. However, Dr. Frederick Cook (10th June, 1865 - 5th August, 1940) declared he had reached the Pole a year earlier in 1908, and Peary's claim is still disputed.
Editors. "Explorers Robert Peary and Matthew Henson reportedly reach the North Pole". The Literary Encyclopedia. First published 20 December 2011; last revised 30 November -1.
[http://www.litencyc.com/php/stopics.php?rec=true&UID=11009, accessed 25 April 2015.]