Cartographers surveying Antarctica have discovered Mt Hope is the tallest mountain in the British Antarctic Territory (BAT) at 3,239 m (10,654 ft) above sea level. Until now, maps showed Mt Jackson as the tallest mountain in the territory at 3,184 m (10,444 ft). New satellite data reveals this isn’t the case, with Mt Hope being 55 m taller than Mt Jackson and 377 m higher than previously thought.