History Main / NoBiochemicalBarriers

2nd Feb '16 9:03:55 AM Akaihiryuu
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** Also justified because the Ancients had the same or very similar chemical composition as modern humans, and deliberately built their Stargates on planets they could inhabit in the Milky Way.
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** Also justified because the Ancients had the same or very similar chemical composition as modern humans, and deliberately built their Stargates on planets they could inhabit in the Milky Way.Way, or terraformed the planets prior to placing stargates. On uninhabitable planets with Stargates, it's often commented that "this planet was probably just like Earth millions of years ago".
2nd Feb '16 8:56:30 AM Akaihiryuu
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** Most humanoid races are affected by the undead plague. Humans, elves, dwarves, gnomes, orcs, and draenei (both from other worlds) can definitely be affected. Humans afflicted with the worgen curse are not affected, however like the Nerubians above, they can be killed by traditional means and then raised via necromancy. The plauge is magical in nature though, so AWizardDidIt.
2nd Feb '16 8:41:46 AM Akaihiryuu
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** On the other hand, it is eventually revealed that the Sebaceans (the human like race on that side of the galaxy) actually were originally humans. They were kidnapped from Earth thousands of years ago by a race of Precursors, and slightly genetically modified.
2nd Feb '16 8:35:47 AM Akaihiryuu
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*** "What are you doing, we don't know if that's poisonous?" Greer (deadpan): "We will."
24th Jan '16 11:28:57 AM karstovich2
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* Averted in the ''VideoGame/SidMeiersAlphaCentauri: Alien Crossfire'' expansion pack - Progenitor and human biological needs are so different that they cannot coexist in colonies together. In game terms, what this means is that when a human faction captures a Progenitor colony (or vice versa), the colony is depopulated to 1 population, and a number of colony pods (based on the population of the colony) are generated, representing the displaced population. Also [[AllThereInTheManual there in the manual]] for the game: the atmosphere of Planet is also nitrogen/oxygen, but the proportion of nitrogen is 90% instead of 78%, and the atmosphere overall is thicker so that while the partial pressure of oxygen is within acceptable limits, the amount of nitrogen you'd have to breathe in would give you nitrogen narcosis. Settlers are mentioned wearing special masks at minimum, and your soldiers are depicted wearing what appear to be pressure helmets. The tie-in novels mentioned that it was possible to go without a mask for short periods of time, so Deirdre made quite an impact on another faction by emerging from her vehicle, unmasked and smiling.
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* Averted in the ''VideoGame/SidMeiersAlphaCentauri: Alien Crossfire'' expansion pack - Progenitor and human biological needs are so different that they cannot coexist in colonies together. In game terms, what this means is that when a human faction captures a Progenitor colony (or vice versa), the colony is depopulated to 1 population, and a number of colony pods (based on the population of the colony) are generated, representing the displaced population. Also [[AllThereInTheManual there in the manual]] for the game: the atmosphere of Planet is also nitrogen/oxygen, but the proportion of nitrogen is 90% instead of 78%, and the atmosphere overall is thicker so that while the partial pressure of oxygen is within acceptable limits, the amount of nitrogen you'd have to breathe in would give you nitrogen narcosis. Settlers are mentioned wearing special masks at minimum, and your soldiers are depicted wearing what appear to be pressure helmets.helmets, although otherwise clothing is fairly "normal" (since other than being a bit off for breathing, Planet's atmosphere does the job just fine). The tie-in novels mentioned that it was possible to go without a mask for short periods of time, so Deirdre made quite an impact on another faction by emerging from her vehicle, unmasked and smiling.
24th Jan '16 11:24:50 AM karstovich2
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* Several diseases can do this. The most notorious include rabies, mad cow disease, foot-and-mouth disease, and the infamous avian flu. There's also distinct possibility that virtually all notable human diseases originated from livestock vectors. Smallpox and anthrax are of bovine origin, influenza of avian and porcine stock, the common cold may be from horses, HIV a variant of SIV from African green monkeys, etc. The only ones that don't show strong relationships with livestock are [=STDs=], with the exception of HIV. But on the whole, these cross-species diseases are still fairly limited. Rabies, for instance, is stunning in its ability to cross species lines, but is still limited to infecting mammals. It would be unlikely to be found in a reptile, inconceivable in an octopus, and beyond ludicrous in an alien.
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* Several diseases can do this. The most notorious include rabies, mad cow disease, foot-and-mouth disease, and the infamous avian flu. There's also distinct possibility that virtually all notable human diseases originated from livestock or other animal vectors. Smallpox and anthrax are of bovine origin, influenza of avian and porcine stock, the common cold may be from horses, Ebola is from bats, HIV a variant of SIV from African green monkeys, etc. The only ones that don't show strong relationships with livestock or other animals are [=STDs=], with the exception of HIV. But on the whole, these cross-species diseases are still fairly limited. Rabies, for instance, is stunning in its ability to cross species lines, but is still limited to infecting mammals. It would be unlikely to be found in a reptile, inconceivable in an octopus, and beyond ludicrous in an alien.
24th Jan '16 10:53:04 AM karstovich2
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** Unlike ''Star Trek'', cross-species hybrids are difficult if not impossible to create naturally. First One tech is able to hybridize the adult Delenn, who then has a hybrid baby with Sheridan by virtue of the fact that she is already a hybrid - and even then, their doctors thought her odds of successful conception were negligible. They ''do'' consider splicing the telepath gene across species barriers, but the telepath gene was actually spliced into most races by the Vorlons, so it was artificial to begin with.
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** Unlike ''Star Trek'', cross-species hybrids are difficult if not impossible to create naturally.naturally (even though cross-species ''sex'' is possible for certain species pairs). First One tech is able to hybridize the adult Delenn, who then has a hybrid baby with Sheridan by virtue of the fact that she is already a hybrid - and even then, their doctors thought her odds of successful conception were negligible. They ''do'' consider splicing the telepath gene across species barriers, but the telepath gene was actually spliced into most races by the Vorlons, so it was artificial to begin with.
24th Jan '16 10:49:52 AM karstovich2
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* Peppers are hot because they are filled with a chemical called capsaicin (or methyl vanillyl nonenamide, if you really must sound impressive). This chemical is toxic to most small mammals, but not to birds, which also cannot taste it and to some extent acts as an anesthetic. The seeds, likewise, can pass through bird digestive systems, but are rendered non-viable by mammals. The capsaicin, thus, serves by its burning sensation to prevent mammals from eating it, leaving the flesh for the birds which help spread the seeds. Humans are large enough that it doesn't normally affect us this way, but most animals don't actively seek out food that burns their mouths.
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* Peppers are hot because they are filled with a chemical called capsaicin (or methyl vanillyl nonenamide, if you really must sound impressive). This chemical is toxic to most small mammals, but not to birds, which also cannot taste it and to some extent acts as an anesthetic. The seeds, likewise, can pass through bird digestive systems, but are rendered non-viable by mammals. The capsaicin, thus, serves by its burning sensation to prevent mammals from eating it, leaving the flesh for the birds which help spread the seeds. Humans are large enough that it doesn't normally affect us this way, kill or poison them, but most animals don't actively seek out food that burns their mouths.mouths...although on the other hand, the fact that humans ''do'' seek out food that burns their mouths can be seen as a victory for the pepper plants' strategy, since the human love of spicy food has resulted in the spread of the peppers far and wide around the world and all but guaranteed the survival of the species that humans have cultivated.
3rd Jan '16 3:38:50 PM Vir
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* In ''WesternAnimation/YoungJustice'', M'gann the Martian appears to catch a human flu, prompting Robin to [[ShoutOut mention]] ''Literature/TheWarOfTheWorlds'', as well as mentioning how unlikely that would be. Its ultimately an aversion, since it was actually a power-leaching villain responsible.
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* In ''WesternAnimation/YoungJustice'', M'gann the Martian appears to catch a human flu, prompting Robin to [[ShoutOut mention]] ''Literature/TheWarOfTheWorlds'', as well as mentioning how unlikely that would be. Its It's ultimately an aversion, since it was actually a power-leaching villain responsible.
3rd Dec '15 7:36:15 AM OrKuunArQenByundis
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* In ''Franchise/{{Halo}}'', every alien species thus far (except for the Engineers and Hunters, who eat sludge and metal respectively) are capable of eating humans with no ill effects. Brutes, especially, consider humans very nice eating (at a NightmareFuel extent), and Grunts, Jackals, and Drones will happily chow down on [=POWs=] and [=KIAs=]. The first human to visit Sanghelios (the Elite homeworld) is served Sangheili food with no problem, although the, um, texture isn't very appetizing ("Who ate that before you?"). The Forerunners can safely eat Earth-based food as well.
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* In ''Franchise/{{Halo}}'', every alien species thus far (except for the Engineers and Hunters, who eat sludge and metal respectively) are capable of eating humans with no ill effects. Brutes, especially, consider humans very nice eating (at a NightmareFuel extent), and Grunts, Jackals, and Drones will happily chow down on [=POWs=] and [=KIAs=]. The first human to visit Sanghelios (the Elite homeworld) is served Sangheili food with no problem, although the, um, texture isn't very appetizing ("Who ate that before you?"). ** The Forerunners can safely eat Earth-based food as well.well. It is mentioned they cannot catch diseases though.
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