Avatar

Artist, writer, weirdo.

@shiisiln / shiisiln.tumblr.com

Avatar

Selected recurrent patterns or "laws" of evolution, of potential use for speculative biology. List compiled by Neocene's Pavel Volkov, who in turn credits its content to Nikolay Rejmers (original presumably in Russian). These are guidelines, and not necessarily scientifically rigorous.

  1. Dollo's Law, or irreversibility of evolution: organisms do not evolve back into their own ancestors. When mammals returned to the sea, they did not develop gills and dermal scales and change back into fish: they became whales or seals or manatees, who retain mammalian traits and show marks of land-dwelling ancestry.
  2. Roulliet's law, or increase of complexity: both organisms and ecosystems tend to become more complex over time, with subparts that are increasingly differentiated and integrated. This one is dodgier: there are many examples of simplification over time when it is selected for, for example in parasites. At least, over very large time scales, the maximum achievable complexity seems to increase.
  3. Law of unlimited change: there is no point at which a species or system is complete and has finished evolving. Stasis only occurs when there is strong selective pressure in favor of it, and organism can always adapt to chaging conditions if they are not beyond the limits of survival.
  4. Law of pre-adaptation or exaptation: new structures do not appear ex novo. When a new organ or behavior is developed, it is a modification or a re-purposing of something that already existed. Bone tissue probably evolved as reserves of energy before it was suitable to build an internal skeleton from, and feathers most likely evolved for thermal isolation and display before they were refined enough for flight.
  5. Law of increasing variety: diversity at all levels tends to increase over time. While some forms originate from hybridization, most importantly the Eukaryotic cells, generally one ancestor species tends to leave many descendants, if it has any at all.
  6. Law of Severtsov or of Eldredge-Gould or of punctuated equilibrium: while evolution is always slow from the human standpoint, there are moments of relatively rapid change and diversification when some especily fertile innovation appears (e.g. eyes and shells in the Cambrian), or new environments become inhabitable (e.g. continental surface in the Devonian), or disaster clears out space (e.g. at the end of the Permian or Cretaceous), followed by relative stability once all low-hanging fruit has been picked.
  7. Law of environmental conformity: changes in the structure and functions of organisms follow the features or their environment, but the specifics of those changes depend on the structural and developmental constraints of the organisms. Squids and dolphins both have spindle-shaped bodies because physics make it necessary to move quickly through water, but water is broken by the anterior end of the skull in dolphins and by the posterior end of the mantle in squids. Superficial similarity is due to shared environment, deep structural similarity to shared ancestry.
  8. Cope's and Marsh's laws: the most highly specialized members of a group (which often includes the physically largest) tend to go extinct first when conditions change. It is the generalist, least specialized members that usually survive and give rise to the next generations of specialists.
  9. Deperet's law of increasing specialization: once a lineage has started to specialize for a particular niche, lifestyle, or resource, it will keep specializing in the same direction, as any deviation would be outcompeted by the rest. In contrast, their generalist ancestors can survive with a marginal presence in multiple niches.
  10. Osborn's law, or adaptive radiation: as the previous takes place, different lines of descent from a common ancestor become increasingly different in form and specializations.
  11. Shmalhausen's law, or increasing integration: over time, complex systems also tend to become increasingly integrated, with components (e.g. organs of an organism, or species in a symbiotic relationship) being increasingly indispensable to the whole, and increasingly tightly controlled.
Avatar
reblogged
Avatar
tepkunset

I was originally planning on holding off sharing this until June, but then decided to hell with that; why wait?

FURTHER RESOURCES:

Please feel free to reblog with more suggestions, if you have them!

Avatar
Avatar
cutecipher

no, actually, trying to position your disgust/annoyance with "stereotypical" trans women as political righteousness doesnt make me want to abandon them it makes me suspicious of you

i love harsh noise girls i love blahaj girls i love video game dev girls i love trans girls and i refuse to tear them down

Avatar
reblogged

When Everything Everywhere All at Once said “The only thing I do know is that we have to be kind. Please, be kind, especially when we don’t know what’s going on" 

When the Good Place said “Why choose to be good every day when there is no guaranteed reward now or in the afterlife… I argue that we choose to be good because of our bonds with other people and our innate desire to treat them with dignity. Simply put, we are not in this alone.” 

When Jean-Paul Sartre said ”‘Hell is other people’ is only one side of the coin. The other side, which no one seems to mention, is also ‘Heaven is each other’. Hell is separateness, uncommunicability, self-centeredness, lust for power, for riches, for fame. Heaven on the other hand is very simple, and very hard: caring about your fellow beings.“

Avatar

Finished up my first Smart Doll sweater this weekend! There are several things I will tweak next time, but I’m still very happy with how it turned out. 🥰

Marvel is also feeling very comfy in her stretch jeans today. I’ve got a couple more in stock on the website right now and more fabric on the way. Thanks for all who ordered the first batch!

Avatar
reblogged
Avatar
farm-paws

Third image top row are cheddar bay biscuits from like red lobster

Avatar

I love that this answers my question but I still don’t know what that is lol. I know what cheddar and biscuits are but not cheddar biscuits. Bay, as in water? Or car park? Loading bay? Unlikely. Bay leaf? Just one? From this I can deduce that this may be a savoury scone of some kind. Or a cheese puff.

Avatar
Avatar
shiisiln

#I have heard of an American seasoning called bay seasoning? so? that?

Yup, it's a spice mix you can buy called Old Bay. Typically associated with seafood.

Avatar
reblogged
Avatar
aliiiiiiice

why don't people in zombie apocalypse stories ever just wear suits of armor? you think any zombie is gonna get their shitty rotting jaws through this?

I'm gonna rip and tear my way through the zombie apocalypse completely unharmed because none of the undead hoards will be able to get through my plate mail

everyone else is like "oh we gotta stay inside the most secure places possible and never leave" and I'll be storming through the wastelands in my bloodstained suit of armor, blasting the Doom (2016) OST and plowing my way through waves of the undead. one of them tries to bite me but his shitty rotting teeth don't even leave a dent in my armor before I turn his head into paste. I'll be unstoppable until I die of dehydration or something like an idiot

Avatar
earlgraytay

this goes along with my other pet peeve about zombie apocalypse stories, namely: why does no one ever think to ride a bike? 

bikes are quiet- if the zombies react to loud noises, they won’t hear you on a bike the way they might hear you in a car. bikes don’t need gas, meaning you won’t be stranded if you run out. bikes are much, much easier to maintain than a car- there’s no computer that can short out, no fiddly engine bits that could kill you if you mess with them wrong. you can learn how to maintain a bike with a couple weeks’ worth of classes. almost every adult knows how to ride a bike, and without cars on the road, it’d be much safer to do. 

what i’m saying is

American author Mark Twain (b. 1835) lurches from his grave only to give you a massive thumbs up and die again

Mark Twain essentially invented the genre of a bystander sent into a time-travel sci-fi plot just to get someone to draw this image for him. And today we can simply search for such a picture. It is a time of wonders