The Thing from Another World 1951

Deep within the Arctic ice, staff at a military research station discover a flying saucer frozen into the ice. They recklessly take the only creature found there—encased in a chunk of ice—back to camp, where it thaws out. Resembling a human, the alien is invulnerable to firearms, possesses unimaginable strength, can regrow lost limbs, and is extremely aggressive. Realizing the gravity of the situation, the polar explorers try to do everything possible to stop the vicious alien.