SKULLs of prior explorers lay on the ice for years, until a big melt.
POLAR magnetism with a difference, draw of being first to the pole.
SPREE of explorers, claims counter-claims, deaths, and now skulls of
THOSE who perished, nestled on the ocean floor.
Note: Amundsen (below) made it back from his Polar expeditions. The poem is not about him.