Image
Researchers haul their equipment to their field sites through snow blown by harsh winds. One researcher, a polar bear guard, carries a rifle on his back in case of an emergency. Credit: Alfred Wegener Institute / Delphin Rouché
Researchers haul their equipment to their field sites through snow blown by harsh winds. One researcher, a polar bear guard, carries a rifle on his back in case of an emergency. Credit: Alfred Wegener Institute / Delphin Rouché

In the early 1900s, Ernest Shackleton...