What will really resolve itself into a race between lighter-than-air and heavier-than-air machines is forthcoming in the attempt to reach the North Pole in ... four-year-old explorer, Grettir ...

But scientists say that the geographical North Pole is on the move and could shift nearly 90 feet (27 metres) by 2100. As the polar ice sheets melt faster in the warming climate, Earth's mass is ...

It's time to recalibrate the navigation systems on ships, airplanes, and (given the time of year) Santa's sleigh: the ...