The 1991 Gela Alta expedition joined a search for a fifty-ton meteorite to a scientific investigation into a lethal parasite. Its divers died after encountering an Arctic worm whose life cycle had been altered to develop rapidly in human beings; Isaiah, who accompanied his father on the expedition, became a later target of the same inquiry. The expedition’s significance lies in how a remote field operation links scientific ambition, lethal exposure, and the concealment of knowledge from those placed at risk.

Background and Participants

The expedition took Isaiah to Greenland with his father. He had earlier fled the ship in Nuuk and was left behind; Loyen found him and sent him home. That history becomes significant when Smilla learns that Loyen had regularly examined Isaiah, suggesting that the boy’s connection to the expedition was not merely incidental. Loyen was trying to establish whether he had been infected.

Tørk described the expedition as a search for an extraordinary meteorite, said to weigh fifty tons and to contain diamonds and substances not found on Earth. The group brought oxygen and acetylene and cut fragments from it. The promise of treasure and scientific discovery thus forms the expedition’s visible purpose, while the divers’ deaths point to a danger that the expedition’s outward story does not explain.

The Divers’ Deaths and the Evidence

Smilla’s interpretation changes after she examines X-rays from the 1966 expedition, which Lagermann had obtained from Queen Ingrid’s Hospital in Nuuk. The images showed remains of the earlier expedition’s dead, but Smilla noted that the divers had not simply died in the explosion: she inferred that a parasite had attacked them. She connected Loyen’s examinations of Isaiah to the possibility that the same disease might have reached him.

Smilla proposes that Isaiah’s father and the others had been diving, and that the parasite could have passed through water. She warns that Tørk is likely to arrange further dives without telling the other participants why they are at risk. This is her reconstruction of the expedition’s danger, not a fully observed account of every diver’s exposure; its force comes from joining the X-ray evidence to the parasite’s known route through aquatic hosts.

The Parasite and Its Changed Life Cycle

At Gela Alta, Tørk demonstrates the organism under a microscope. The small water flea Cyclops marinus carries a worm that Tørk identifies as Dracunculus borealis, the Arctic worm. In its established cycle, the parasite develops through water fleas and larger mammals, including whales, seals, and dolphins. It releases larvae into the sea, where the fleas ingest them; a larger mammal becomes infected when it takes in the flea, and the worm matures in the new host.

Tørk explains that the natural cycle is usually constrained by the parasite’s dependence on its hosts and on suitable conditions. In his account, a good parasite does not normally kill its host: the established relationship is one of compatibility. That balance is disrupted when the worm is made capable of infecting people and developing far faster than it does in sea mammals.

Tørk says that it took Loyen twenty-five years to determine that the larva had adapted to the human immune system. Once inside the mouth, it penetrates the mucous membranes and forms a protective layer from the person’s own proteins, allowing it to evade the body’s defenses. Instead of developing over months in a sea mammal, it grows rapidly, and stages that can take up to six months in marine hosts may take only days in a human being.

The parasite’s capacity to survive in different fish further weakens a natural limit on its spread. Smilla understands that it is not restricted to a narrow range of transmitting hosts. Tørk nevertheless describes a remaining constraint: in the absence of enough human hosts, the parasite’s development stays slow in sea mammals, and it depends on infected material reaching seals that can carry it onward. Human infection changes the pace of that process and makes the expedition’s divers particularly vulnerable.

Consequences and Significance

The expedition’s deaths reveal a collision between an old ecological relationship and an experimentally altered one. The worm’s ordinary cycle can persist without killing its hosts, but its rapid development in humans turns that compatibility into a threat. The deaths are therefore not simply an unexplained consequence of working in a remote environment: they force Smilla to reconsider the expedition’s scientific history and the danger facing anyone asked to dive.

The event also exposes the unequal distribution of knowledge and risk. Smilla argues that Tørk would not tell the divers what he knew, even as he sought to involve them in further dives. The episode places the supposed promise of meteorite fragments and scientific distinction beside the concealed biological danger, making discovery inseparable from the question of who is allowed to understand its costs.