History WebVideo / AlienBiospheres

* BizarreAlienPsychology: Neotecton ecumenes, the sapient species of the planet, downplay this trope. They naturally tend to be more hierarchal and more tribalistic then humans, and have vastly different understandings of cuteness (finding long creatures with short or absent legs to be the cutest), all the while having a completely different understanding of the concepts of feminity and masculinity.

* BizarreAlienPsychology: Neotecton ecumenes, the sapient species of the planet, downplay this trope. They naturally tend to be more hierarchal and more tribalistic then humans, and have vastly different understandings of cuteness(finding long creatures with short or absent legs to be the cutest), all the while having a completely different understanding of the concepts of feminity and masculinity.

* BizarreAlienReproduction: The tentaclostomes' digestive tract is connected to their reproductive system, so they mate and expel eggs through their mouths. Many real life invertebrates work the same way, such as sea cucumbers.

[[https://www.youtube.com/playlist?list=PL6xPxnYMQpquNuaEffJzjGjMsr6VktCYl Alien Biospheres]] is a series of SpeculativeBiology videos by [=YouTube=] user [[https://www.youtube.com/channel/UCMjTcpv56G_W0FRIdPHBn4A Biblaridion]]. It starts with Biblaridion making a hypothetical alien planet with the help of fellow [=YouTuber=] {{WebAnimation/Artifexian}}, then he creates various diverse alien lifeforms to inhabit it starting with two bodyplans: the radially symmetric anthostomes, and the bilaterally symmetric polypods, with 3D computer models used to represent each individual organism. The anthostomes later give rise to the shelled cephalopod-like tentaclostomes and their terrestrial descendants the lophostomes, while the polypods give rise to the spider-like sarcopods and ''their'' terrestrial descendants the osteopods. Each species exists to teach the audience about a real-world biological or evolutionary trend on Earth.

* AllThereInTheScript: The planet's name, Tira, is never given in the actual videos, only in Biblaridion's Discord. Subverted at the end of Episode 14, where the name is finally revealed at the end.

** The Isla Proxima species introduced in Episode 11 return in Episode 13 only to be driven extinct thanks to their island adaptations unable to compete with the large mainland herbivores and carnivores.

* ChestMonster: The phyllophorans have evolved to mimic chromatophytes to attract nectar and fruit-eating animals and then ambush them.

* ChangelingFantasy: The apatocheirids are a lineage of brood parasitic rhamphodonts that sneak into the nests of their close relatives, the acrocheirids, to deposit their own grubs alongside the acrocheirid grubs. The imitation grubs [[KillAndReplace kill off the real grubs]] to prevent suspicion from the helpers at the nest.

* OhCrap: Artifexian has this reaction when Biblaridion suggests messing with the atmosphere and adding a high dose of hydrogen sulfide. As detailed under ArtisticLicenseChemistry, this would result in a planet that would be ''set on fire'' by one bad lightning strike (which the series [[AceeptableBreaksFromReality ignores for the sake of plot]]).