You Ever Think About How Crows Are Acting Not Unlike How Early Humans Probably Did And You're Just Like.

You ever think about how crows are acting not unlike how early humans probably did and you're just like. Oh ok

More Posts from Sieveplayer and Others

11 months ago

a man with long hair speaks an angel’s cant while a man with short hair speaks drivel. a man with long hair hides the world in his gaze while a short-haired man is depthless.

2 years ago

Blue Chips

My gangsta name sounds like insult.... 😶

My Gangsta Name Sounds Like Insult.... 😶

Sky Blue boiled egg

LET'S PLAY❤️

@flamingblinglove @birinboom @zeetrip @devilsrose666 @monaukah @demonbanger @mikuyuuss

And anyone who like to join❤️❤️😝

6 years ago
1 year ago

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

3 years ago
Thing From My World Theia. Essentially Earth But With More Crazy Stuff Going On. This Is Where My Characters

Thing from my world Theia. Essentially Earth but with more crazy stuff going on. This is where my characters live.  


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1 year ago

A boy can dream, can't he?

A Boy Can Dream, Can't He?
8 years ago

i’m so pissed that civilization VI looks like it’s going to be a really good and vastly improved game because now i don’t have a reason to just keep playing V :(

6 years ago

Hmmmmmm

1 year ago

This will go amazing with my bathtub that is just full of eyeballs

8 years ago
Carl Winslow Had A Hard Life.

Carl Winslow had a hard life.

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sieveplayer - Sieve's
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