In July, Richard Parks (who is also a former Welsh rugby player) became the first person to achieve the "Explorers Grand Slam" in a single calendar year. Wikipedia notes that about twenty others have accomplished this extremely daunting task.
The "Explorers Grand Slam" consists of scaling all the "Seven Summits" (i.e. the highest peaks on seven continents). Additionally, what two milestones (that are, in a sense, contrary to each other) must an intrepid explorer reach to achieve this feat?
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Reaching both the North Pole and the South Pole.