this post was submitted on 04 Jun 2026
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Science Memes

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[–] RandomStickman@fedia.io 124 points 3 weeks ago (4 children)

My attempt at an explanation

  • Ducks are dinosaurs: Ducks, as with all birds, evolved from theropods and are considered living dinosaurs.

  • Horses walk on middle fingers: Ancestors of modern horses have 5 toes the size of a small dog. Eventually they evolved away the other toes and only the middle toe remain.

  • Bees are crustaceans: Crustacea is not a single branch in the tree of life but a collection of multiple branches (i.e. paraphyletic). If we pick a point and said everything after that is considered the same group, then by necessity we have to put bees (and all hexapoda) and what we traditionally call crustaceans into a single group. That group would be pancrustacea. Is that exactly the same as saying bees are crustaceans? Are jackdaws crows? I'll let you decide.

  • Pterodactyls are fish: Fish is also not a single branch. By the same token, if we want to put what we traditionally counted as fish (such as sharks, carps, and lungfishes) together as a single group, we have to include all vertebrates (which includes pterodactyls, us, whales, etc.)

  • Redwood are algae: I'm not too sure about this one. The wikipedia page for algae say that it excludes the land plants (embryophytes) which redwoods are part of.

  • Humans are part virus: Viruses have the ability inject and splice their genetic material into our genome and have our cells do the cloning for them. Usually it is not passed on to the next generation. Apparently an ancient strain of virus from millions of years ago incorporated themselves into our genome and our germ cells (sperm and egg) and can be passed on to the next generation.

[–] nialv7@lemmy.world 75 points 3 weeks ago (3 children)

an ancient strain of virus from millions of years ago incorporated themselves into our genome

not just one. 5-8% of the human genome comes from viruses

[–] MalReynolds@slrpnk.net 16 points 3 weeks ago

And provides fertile ground for evolution by providing space for gene duplication and divergence. Likely also for miRNA control systems.

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[–] deranger@sh.itjust.works 20 points 3 weeks ago* (last edited 3 weeks ago) (1 children)

Everything is virus: one of the theories of how cells went from RNA to DNA is viruses.

Forterre (2006) proposed that early cellular lineages diversified while still harboring RNA genomes, with viruses and cells coexisting from the beginning. In his model, the first fixation of DNA occurred in viruses, which subsequently transferred the enzymes necessary for DNA synthesis and maintenance into independent cellular lineages. Thus, RNA genomes in ancestral cells were converted into DNA genomes via viral intermediates (Forterre, 2002, 2006). The structural and functional differences among cellular replication systems would then reflect the independent viral origins of DNA replication machinery.

https://www.sciencedirect.com/science/article/abs/pii/S0303264725002813

[–] BurgerBaron@quokk.au 7 points 3 weeks ago

The latest puzzle: what the viroids doin' in our guts? Nobody knows, we are only just realised they are widespread and not exclusive to flowers or whatever Anton told me. Tiny simple RNA smudges that are too simple to even qualify as a virus.

I feel like they're as close to abiogenesis as we'll ever get, with these living fossils.

[–] bluestem@lemmygrad.ml 6 points 3 weeks ago* (last edited 3 weeks ago) (1 children)

"Redwood are algae" is a similar statement to "Pterodactyls are fish" or "bees are crustaceans". Redwoods are land plants, thus are also members of Viridiplantae - the clade containing land plants and green algae. The sister taxa to Viridiplantae in clade Archaeplastida are Glaucophyta (unicellular algae), and Rhodaria (contains red algae among other things). Thus since land plants are more closely related to green algae than green algae is to red algae or glaucophytes, if we want to treat the term "algae" as a monophyletic clade, then we have to include land plants in that, which of course includes redwoods. Essentially, this framing would make the term "algae" equivalent to Archaeplastida.

Another simpler interpretation (same idea as "ducks are dinosaurs") might be that all land plants evolved from algae, and nothing can evolve out of a clade, therefore plants must be algae. My hesitation to put this first is due to the fact that I'm unsure if the most recent common ancestor of green algae and plants would itself be classified as algae - this is an exercise left to the reader.

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[–] Rudee@lemmy.ml 4 points 3 weeks ago

Damn, how did the horse ancestors walk with toes the size of small dogs?

[–] Danarchy@lemmy.nz 56 points 3 weeks ago (2 children)
[–] massive_bereavement@fedia.io 18 points 3 weeks ago

Knowledge is power.

[–] enbiousenvy@lemmy.blahaj.zone 9 points 3 weeks ago (1 children)

french is fries which is belgian

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[–] JoMiran@lemmy.ml 38 points 3 weeks ago* (last edited 3 weeks ago) (4 children)

Human are an advanced bio mech suit for bacteria. Human cells - 37 trillion (majority red blood cells). Bacteria in the human body - 38 trillion.

There is a non-zero chance that the human consciousness is the product of bacteria forming a mesh neural network that hijacks the human brain's voluntary functions. It could explain why some people suffer emotional distress while under antibiotics (I get severe depression).

Just playing with ideas.

[–] TranscendentalEmpire@lemmy.today 30 points 3 weeks ago (4 children)

It could explain why some people suffer emotional distress while under antibiotics (I get severe depression).

More than 90% of the serotonin in your body is produced in your gut in a process that is regulated by bacteria. This serotonin not only aids in digestion, but interacts with nerves that communicate with the central nervous system to alter mood and mental health

If you experience severe depression under antibiotics, you might try to take some probiotic supplements that have strains including Lactobacillus and Streptococcus along with a helping of some soluble fiber.

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[–] MalReynolds@slrpnk.net 21 points 3 weeks ago (1 children)

It could explain why some people suffer emotional distress while under antibiotics

Or just that nuking gut bacteria messes with the gut brain axis...

[–] LaLuzDelSol@lemmy.world 11 points 3 weeks ago

I do like that the brain gives itself immune privilege and the blood brain barrier, it's like "miss me with that shit" haha

[–] janus2@lemmy.zip 16 points 3 weeks ago

babe wake up new genre of existential crisis just dropped

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[–] groet@feddit.org 32 points 3 weeks ago (5 children)
  • ducks are fish
  • dinosaurs are fish
  • horses are fish
  • pterodactyls are fish
  • humans are fish
[–] spacegoat@lemmy.world 14 points 3 weeks ago (1 children)
[–] groet@feddit.org 11 points 3 weeks ago

But not all. That would be ridiculous!

[–] craftrabbit@lemmy.zip 6 points 3 weeks ago (1 children)
[–] Aeao@lemmy.world 4 points 3 weeks ago

Just a friendly reminder that, like fish, humans are coated with protective slime!

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[–] jaded_genie@lemmy.world 23 points 3 weeks ago (2 children)
[–] phdepressed@sh.itjust.works 18 points 3 weeks ago (2 children)

Ducks are avians, thus descended from dinosaurs.

Anatomically, the hoof of a horse is equivalent to a human middle fingernail.

There are "sea bees" tiny crustaceans that are pollinators of underwater plants. Both crustaceans and "bugs" are arthropods.

Not sure about the pterodactyl fish reference.

Redwoods and all plants really descend from photosynthetic algae.

About 8% of the human genome is composed of ancient viral DNA from viruses that integrated into DNA...

[–] wyldrstallyns@lemmy.dbzer0.com 4 points 3 weeks ago (3 children)

I believe the pterodactyl, like most (all?) dinos descended from aquatic life forms. Dunno, though.

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[–] iilwl@lemmy.dbzer0.com 13 points 3 weeks ago (1 children)

It's cladistics.

"Theoretically, a last common ancestor and all its descendants constitute a (minimal) clade. Importantly, all descendants stay in their overarching ancestral clade. For example, if the terms worms or fishes were used within a strict cladistic framework, these terms would include humans."

[–] arctanthrope@lemmy.world 11 points 3 weeks ago (3 children)

so basically it's a language problem, not a biology problem? people are incorrectly assuming that any group of species with a word to describe it must be monophyletic, and therefore include all unrelated species which would make it monophyletic?

[–] iilwl@lemmy.dbzer0.com 8 points 3 weeks ago* (last edited 3 weeks ago)

I'm honestly surprised this isn't better understood in this community, at least as an approach to the tree of life system of classification, with or without its merits. I didn't go to college and went to public school that suppressed science education, but this was how I came to understand evolution and that all types of life had a universal common ancestor.

I'm not speaking to the accuracy of the meme, and the science community at large has its criticisms of cladistics, but I'm not sure I would define this as a problem of biology or language, or a problem at all. It is the most common method of evolutionary classification at this time.

Keep in mind I'm a blue collar worker on my lunch break and not a scientist nor college educated. I just like to learn in my free time about a bunch of stuff.

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[–] panda_abyss@lemmy.ca 16 points 3 weeks ago (2 children)
[–] crazycraw@crazypeople.online 16 points 3 weeks ago (1 children)

Yeahhh, I looked it up and I don't know what OP meant. there are redwood lichen who live symbiotically with the trees but are separate life forms.

Then there's the "redwoods of the sea" huge kelp like algae structures that resemble tree growth patterns but.. like aren't the actual redwood trees.

soooo yeah. I dunno.

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[–] mrmisses@lemmy.world 11 points 3 weeks ago (5 children)
[–] dohpaz42@lemmy.world 6 points 3 weeks ago (1 children)

Careful you don’t get banned for being an eco fascist. 🫣

[–] wyldrstallyns@lemmy.dbzer0.com 5 points 3 weeks ago

Eco-rebel, TBF. ☝🏼

[–] hansolo@lemmy.today 5 points 3 weeks ago (6 children)

You know, I'm starting to think that our whole universe is just a cancerous 3+1D polyp on the ass of an entire, proper universe with more dimensions, mass, and energy, and less corruption.

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[–] TheTechnician27@lemmy.world 11 points 3 weeks ago* (last edited 3 weeks ago) (1 children)

"Pterodactyls are fish" seems disingenuous to insert when two of the previous ones are about pedantic taxonomy facts (which are true). "Fish" are paraphyletic and thus not an actual taxon, but as a practical group, it's all non-tetrapod vertebrates – and order Pterosauria are decidedly tetrapods.

It's trying to be pedantic in a cheeky way but just ends up being wrong.


Edit: Just so I balance this out, though, anyone wanting to be humorously pedantic about aquatic taxonomy should check out WoRMS (the World Register of Marine Species). They've always been, to me, the most up-to-date source on the taxonomy of marine, freshwater, and brackish biota short of reading the actual scientific literature.

[–] bisby@lemmy.world 7 points 3 weeks ago (1 children)

I find pedants are often wrong or completely missing the point.

Sometimes it triggers a fun discussion. and sometimes it's just tedious.

(ghoti could never be pronounced like "fish" because "gh" only sounds like an F near the end of a word after au or ou, but ghoti is at least an interesting way to bring up the topic of weird inconsistencies of the english language, even if it's wrong)

[–] TheTechnician27@lemmy.world 8 points 3 weeks ago (1 children)

My favorite way to slap an English speaker in the face with the silly irregularities of English pronunciation is to show them the 1920 poem The Chaos.

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[–] lvxferre@mander.xyz 10 points 3 weeks ago

If it looks like a duck, swims like a duck, and quacks like a duck, then it probably is a dinosaur.

[–] nialv7@lemmy.world 8 points 3 weeks ago* (last edited 3 weeks ago)
[–] qualia@lemmy.world 5 points 2 weeks ago (3 children)

Humans share a common ancestor with tardigrades.

[–] x0x7@lemmy.world 9 points 2 weeks ago (2 children)

Almost everything is a worm. Not just in heredity, but also in form. You are a worm that uses long mineral deposits and muscles to stand erect and move around in an erect position for some reason. Weirdest worm.

[–] YiddishMcSquidish@lemmy.today 4 points 2 weeks ago

Meat tubes.

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[–] Yaky@slrpnk.net 4 points 3 weeks ago

On a more serious note, Some Assembly Required by Neil Shubin has a lot of fascinating stuff like this about evolution.

[–] bluegreenpurplepink@lemmy.world 4 points 3 weeks ago

Bill Hicks was right, "We're a virus with shoes."

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