#EVOLUTION

[megmelodia]

This has been a psa from pakicetus

[boobookittenartblog]

The Evolution of Cats by Julio Lacerda

https://www.instagram.com/lacerda.julio

[theyonagoda]

Last Universal Common Ancestor

[katborg82]

Last flocking of the year!! Happy holidays!!!!

Parapuzosia, Aerosteon,

Carinodens, Perucetus

[beyond-the-beast]

I've owned each of the systems so far... Still need to get a PS5 though!

The evolution of the playstation

[olive-ridley]

All roads lead to Rome, all lineages evolve to CRAB 🦀🦀

[druid-for-hire]

[image id: a four-page comic. it is titled "immortality” after the poem by clare harner (more popularly known as “do not stand at my grave and weep”). the first page shows paleontologists digging up fossils at a dig. it reads, “do not stand at my grave and weep. i am not there. i do not sleep.” page two features several prehistoric creatures living in the wild. not featured but notable, each have modern descendants: horses, cetaceans, horsetail plants, and crocodilians. it reads, “i am a thousand winds that blow. i am the diamond glints on snow. i am the sunlight on ripened grain. i am the gentle autumn rain.” the third page shows archaeopteryx in the treetops and the skies, then a modern museum-goer reading the placard on a fossil display. it reads, “when you awaken in the morning’s hush, i am the swift uplifting rush, of quiet birds in circled flight. i am the soft stars that shine at night. do not stand at my grave and cry.” the fourth page shows a chicken in a field. it reads, “i am not there. i did not die” / end id]

a comic i made in about 15 hours for my school’s comic anthology. the theme was “evolution”

[theartofmadeline]

i promise i wouldn't blame you

[sixth-light]

#not to be pedantic but Neanderthals and Denisovans aren't actually our ancestors#they're a separate branch that coexisted with early homo sapiens

I mentioned Neanderthals and Denisovans specifically because it is extremely well-established by now that all modern humans have some Neanderthal ancestry and some populations in Asia and Oceania also have Denisovan ancestors. There's also evidence of ancestry from other, as-yet unidentified ancient hominin species which we can't track down the same way because it happened in environments where DNA isn't well-preserved. (We know about Neanderthal and Denisovan ancestry because of studies comparing DNA isolated from Neanderthal and Denisovan bones and modern human DNA). There's considerable evidence that human evolution should be viewed as a 'braided stream' rather than a 'tree of life', with different populations separating and re-connecting throughout the last several million years.

And that's kind of my point! Hominin species have been criss-crossing Eurasia and Africa for literally millions of years, and populations of modern humans radiated out into Australia, Oceania, and the Americas tens of thousands of years ago. The European 'Age of Exploration' post-dates all of that, and the concept of the unpopulated frontier that goes along with European colonisation is antithetical to almost all of the reality of human history and pre-history.

(PS: if this topic is of interest you should check out The World Before Us by Tom Higham, which is a very accessible and up-to-date book on recent human evolution and how we know what we know about it.)

Not adding this onto the post that keeps crossing my dash because it's not really relevant to that discussion, but: anytime the phrase 'nobody was living there' comes up as a form of justification for something or other, it is worth keeping in mind that in literally the last ten thousand years or so the only major areas of the world to have been settled by humans for the first time are Greenland, Iceland, Aotearoa New Zealand, and Madagascar. (We shall not count Antarctica on the grounds that nobody lives there permanently or is ever likely to.) Everywhere else has been inhabited by humans for tens of thousands of years. Even when Homo sapiens left Africa our ancestors were encountering (checks notes) our other ancestors, Neanderthals and Denisovans, not to mention other human species now extinct.

The myth of the unpopulated frontier, open for expansion, is just that: a myth, and one that generally serves a specific purpose in terms of justifying settler-colonialism. The question the phrase 'nobody was living there' demands is - who are you calling 'nobody'?

[samimarkart]

Grounded Flight

2024, decolorant screenprint on quilted cotton

[casualcarpetshark]

BOW DOWN TO THE ANCIENT ONE

[jamlikejelly1]

“People don’t realize how a man’s whole life can be changed by one book.” - Malcolm X

Malcolm X

[artifacts-and-arthropods]

Yellowjacket-Mimicking Moth: this is just a harmless moth that mimics the appearance and behavior of a yellowjacket/wasp; its disguise is so convincing that it can even fool actual wasps

This species (Myrmecopsis polistes) may be one of the most impressive wasp-mimics in the world. The moth's narrow waist, teardrop-shaped abdomen, black-and-yellow patterning, transparent wings, smooth appearance, and folded wing position all mimic the features of a wasp. Unlike an actual wasp, however, it does not have any mandibles or biting/chewing mouthparts, because it's equipped with a proboscis instead, and it has noticeably "feathery" antennae.

There are many moths that use hymenopteran mimicry (the mimicry of bees, wasps, yellowjackets, hornets, and/or bumblebees, in particular) as a way to deter predators, and those mimics are often incredibly convincing. Myrmecopsis polistes is one of the best examples, but there are several other moths that have also mastered this form of mimicry.

Above: Pseudosphex laticincta, another moth species that mimics a yellowjacket

These disguises often involve more than just a physical resemblance; in many cases, the moths also engage in behavioral and/or acoustic mimicry, meaning that they can mimic the sounds and behaviors of their hymenopteran models. In some cases, the resemblance is so convincing that it even fools actual wasps/yellowjackets.

Above: Pseudosphex laticincta

Such a detailed and intricate disguise is unusual even among mimics. Researchers believe that it developed partly as a way for the moth to trick actual wasps into treating it like one of their own. Wasps frequently prey upon moths, but they are innately non-aggressive toward their own fellow nest-mates, which are identified by sight -- so if the moth can convincingly impersonate one of those nest-mates, then it can avoid being eaten by wasps.

Above: Pseudosphex laticincta

I gave an overview of the moths that mimic bees, wasps, yellowjackets, hornets, and bumblebees in one of my previous posts, but I felt that these two species (Myrmecopsis polistes and Pseudosphex laticincta) deserved to have their own dedicated post, because these are two of the most convincing mimics I have ever seen.

Above: Pseudosphex sp.

I think that moths in general are probably the most talented mimics in the natural world. They have so many intricate, unique disguises, and they often combine visual, behavioral, and acoustic forms of mimicry in order to produce an uncanny resemblance.

Several of these incredible mimics have already been featured on my blog: moths that mimic jumping spiders, a moth that mimics a broken birch twig, a moth caterpillar that can mimic a snake, a moth that disguises itself as two flies feeding on a pile of bird droppings, a moth that mimics a dried-up leaf, a moth that can mimic a cuckoo bee, and a moth that mimics the leaves of a poplar tree.

Moths are just so much more interesting than people generally realize.

Sources & More Info:

Journal of Ecology and Evolution: A Hypothesis to Explain Accuracy of Wasp Resemblances

Entomology Today: In Enemy Garb: A New Explanation for Wasp Mimicry

iNaturalist: Myrmecopsis polistes and Pseudosphex laticincta

Transactions of the Entomological Society of London: A Few Observations on Mimicry

[prokopetz]

If you've seen trivia posts going around, may have seen ones about the baculum, a bone in the penis whose purpose is to help support erections which is present in most placental mammals, including non-human apes, but which is conspicuously absent in humans.

Those posts typically don't go into why this is the case, which is fair enough, since the question is far from settled. However, there are a lot of hypotheses about it, and some of them are pretty fucking wild.

I think my personal favourite is the recently proposed idea that, since soft tissue injuries tend to heal more rapidly and completely than broken bones, a flexible and resilient boneless penis constitutes a reproductive advantage in situations where genital trauma is common, possibly as a result of the development of upright posture rendering the penis more prone to blunt encounters.

Like, imagine humanity's proto-hominid ancestors going "actually, bipedalism is great" and promptly getting whacked in the ding so much that it exerted evolutionary pressure on the morphology of the penis.

[scentedwonderlandpoetry]

Further new discoveries have been made on my theory.