“The eyes opened wide,” he continued as the scene unfolded on the main screen, “the body stiffened and the chest expanded. A fairly normal reaction, you’ll agree. An initial moment of paralysis followed by hyperventilation so that as much oxygen as possible is available in the lungs either to scream for help or to drive the muscles for a quick getaway. But our attention was concentrated on what was happening to the three attending physicians and the affected team-member, so that we did not notice that the patient’s chest remained expanded for several minutes, that it was, in fact, holding its breath.”
On the screen Thornnastor toppled heavily to the floor, the Kelgian nurse collapsed into a limp heap of fur, Edanelt’s bony undershell clicked loudly against the floor, the transfer team-member also collapsed and everyone else who was unprotected headed for the pressure litter or the breathing masks. “The effects of this socalled bug,” Conway went on, “were sudden and dramatic. Respiratory failure or partial failure and collapse, and clear indications that the voluntary and involuntary muscle systems had been affected. But there was no rise in body temperature, which would be expected if the beings concerned were fighting an infection. If infection is ruled out, then the DBPK life-form was not as defenseless as it looked…”
To be the dominant life-form on its planet, the DBPKs had to have some means of defending themselves, Conway explained. Or more accurately, the beings who really needed it had a means of defense. Probably the adult DBPKs were mentally agile enough to avoid trouble and to protect their young when they were small and easily carried. But when the children grew too large for their parents to protect and were as yet too inexperienced to protect themselves, they had evolved a means of defense that was effective against everything that lived and breathed.
When threatened by natural enemies, the young DBPKs released a gas-which resembled in its effects the old Earth-snake venom curare, with the rapidity of action of some of the later nerve gases- so that the enemy’s breathing stopped and it was no longer a threat. But it was a two-edged weapon in that it was capable of knocking out everything that breathed oxygen, including the DBPKs themselves. However, the event that triggered the release of the gas also caused the being concerned to hold its breath, which indicated that the toxic material had a complex and unstable molecular structure that broke down and became harmless within a few moments of release, although by that time the natural enemy was no longer a threat.
“With the rise of civilization and the coming of cities, leading to large numbers of the beings of all age groups living closely together, the defense mechanism of the DBPK children became a dangerous embarrassment. A suddenly frightened child, reacting instinctively, could inadvertently kill members of its own family, passers-by in the street or classmates in school. So the organ that released the gas was painted over and sealed until the child reached maturity and the organ became inactive.” There were probably psychological or sociological reasons, Conway thought, why the active organs were painted to resemble those of a ‘safe’ adult.
“But the patient is a preadolescent of a race that has star travel, and it would expect to see alien life forms,” Conway continued, turning away from the screen as the recording flicked off. “It reacted instinctively because of weakness and physical injury, and almost immediately realized what it had done. Judging by Prilicla’s emotion readings, it felt guilty; was desperately sorry for what it had done to some of the friends who had rescued it, and was helpless because it could not warn us of the continuing danger. Now it has been rendered safe again and it is relieved, and judging by its emotional reaction to this situation, I would say that these are nice people-”
Conway broke off as the screen lit again to show the faces of both Colonel Skempton and Major O’Mara. The Colonel looked flustered and embarrassed and he kept his eyes on something he was holding off-screen as he spoke.
“We have received a signal from the Descartes within the past few minutes. It reads: I am disregarding your recent signal. DBPK home planet located and first-contact procedure well advanced. Content of your signal suggests that survivor is a preadolescent DBPK and you are having problems. Warning, do not treat this being without using face masks or light protective suits, or move into the vicinity of the being without similar protection. If precautions have not been taken and hospital personnel are affected, they must be given immediate mechanical assistance with breathing for a period of two-plus hours, after which breathing will resume normally with no aftereffects. This is a natural weapon of defense possessed only by young DBPKs, and the mechanism will be explained to you when the two DBPK medics arrive. They should arrive within four hours in the scoutship Torrance to check on the survivor and bring it home. They are also very interested in the multienvironmental hospital idea and have asked permission to return to Sector General for a while to study and..