History Main / ArtisticLicenseBiology

* ''Franchise/PlanetOfTheApes'' has apes develop human level intelligence remarkably fast, though this was possibly later retconned into being the result of a stable time lop. However that does not explain the mysterious plague that wiped out cats and dogs (thus causing apes to be kept as common pets) and ''only'' affected cats and dogs. A disease that could kill both species is hardly impossible, they are both mammals after all, but they are not particularly closely related (with their last common ancestor being 42 million years ago) so any disease that affected both species would almost certainly have affected many other mammals as well, quite possibly including humans and apes.

* ''Franchise/PlanetOfTheApes has apes develop human level intelligence remarkably fast, though this was possibly later retconned into being the result of a stable time lop. However that does not explain the mysterious plague that wiped out cats and dogs (thus causing apes to be kept as common pets) and ''only'' affected cats and dogs. A disease that could kill both species is hardly impossible, they are both mammals after all, but they are not particularly closely related (with their last common ancestor being 42 million years ago) so any disease that affected both species would almost certainly have affected many other mammals as well, quite possibly including humans and apes.

* One episode of ''Series/LawAndOrderSpecialVictimsUnit'' that has blood type as a plot point ("Stranger") has a doctor first make the claim that a child of two parents with type A blood can only be type A, and then that a type A mother could not give birth to a type B child (the latter being to rule out the possibility of the child being a product of an affair). Apparently the doctor forgot that recessive O genes exist: if both parents have a recessive O gene, they have a 25% chance of having a child with type O blood[[note]]which is irrelevant in this case because the girl at the center of the case is type B, but the doctor is still making an incorrect statement when he says that if both parents are A, the child "can only be type A"[[/note]], and a type A mother with a recessive O gene and a type B or AB father ''could'' have a type B child if the child got a B gene from the father and an O from the mother.

** "What You See Is What You See": The femur being the strongest bone in the human body, there's no way Sheldon could've twisted it to make the lodged bullet fall out.
** "What Schemes May Come": A laboratory mouse is used to demonstrate how an apparently dead victim had been put into an experimental state of hibernation. The mouse is hooked up to a heart monitor, which can be heard slowing as it enters hibernation and then speeding up as it revives... but only to a (human) rate of ~75 beats per minute, rather than the ''500+'' beats per minute that would be typical for a mouse. A mouse with a human's heart rate would ''have'' to be in hibernation just to be alive.

*** While {{mutants}} are supposedly "[[EvolutionaryLevels the next step in human evolution]]", a claim which in and of itself shows a lack of understanding of the concept of evolution, absolutely ''none'' of their powers work without liberal use of the MST3KMantra. Also, the fact that ''one'' mutated gene [[MagicGenetics can apparently do so much]] and the constant claims that mutants are not humans show a clear misunderstanding of what the word "mutation" even means. The vast majority of mutants have absolutely ludicrous powers, {{hand wave}}d by [[SufficientlyAdvancedAlien the Celestials]] inserting the x-gene in humanity millennia ago, known as the celestial seed.

* ''[[https://www.fanfiction.net/s/10781990/1/the-man-with-two-souls the man with two souls]]'', a ''WebAnimation/{{RWBY}}'' fic, depicts Jaune's evil split personality as being physically stronger and more martially skilled than him. Despite sharing the same body.

* ''Fanfic/FullMetalDragon'' doesn't even have to start before this happens. Jake's mom had an affair while she was still pregnant with him. resulting in two infants. Jake stayed with them while the other child went with his father, Hoenheim of Light. While this ''is'' possible (it's called [[http://en.wikipedia.org/wiki/Superfetation superfetation]]) it's also ridiculously rare -- there have been only ten known human cases.