Would Everest have been scaled, the Moon walked upon or the north and south poles reached without footwear?
The sun's magnetic north and south poles were in their respective northern and southern hemisphere several months ago.
By the time he was 33 he had become the first man to walk to both the North and South poles unsupported.
Ms Daniels, 44, was a member of the first all-women teams to trek to both the North and South Poles.
The magnetic field forces the particles toward the north and south poles.
Sir Ranulph was the first man to visit both the North and South Poles by foot and the first to completely cross Antarctica by foot.
Fiennes has previously been the first person to reach both the North and South Poles by land and the first to cross Antarctica on foot.
It is in a so-called polar orbit: each turn around Mars takes it over the north and south poles while the planet revolves beneath it.
Sir Ranulph was the first man to reach both North and South Poles by land and was also the oldest Briton to climb Everest, in 2009, at the age of 65.
In 1998, Mr Hempleman-Adams became the first person to complete the Adventurers' Grand Slam after climbing the highest peaks in seven continents and reaching the geographic and magnetic North and South Poles.
Less than 30 years after the invention of powered flight, British pilots were looking for an aviation record to beat their American rivals - who had already flown over both the North and South Poles.
Furthermore, scientists are keen to find out if the Earth's magnetic poles are about to "flip" - with magnetic North becoming South, and vice versa.
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