Sir Ranulph Twisleton-Wykeham-Fiennes, 3rd Baronet (born 7 March 1944) is an English explorer and writer, who holds several endurance records. Fiennes served in the British Army for eight years, including a period on counter-insurgency service while attached to the Army of the Sultanate of Oman. He later undertook numerous expeditions and was the first person to visit both the North Pole and South Pole by surface means and the first to completely cross Antarctica on foot. In May 2009, at the ag…