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Cake day: June 4th, 2023

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  • Tlaloc_Temporal@lemmy.catoScience Memes@mander.xyzOxygen
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    2 days ago

    Fire gets it’s energy from fuel+oxygen. Most life does too. Plants (and other photosynthetic organisms) can also get energy from light but that requires you to sit in the sun doing not much for a long time. There’s also chemosynthesis, where energy is obtained from a chemical reaction, but that’s usually not nearly as powerful as oxidation.

    Put another way, a car with NOS is way faster and more powerful than one without. So too is life that uses oxygen more powerful than life that doesn’t.









  • Well if we want to get pedantic, every unique thing passed around and spread is a meme. Jokes, art styles, idioms, words, greetings, most social behavior really. And you can go a step further and say diseases, species, even all of life is a meme.

    And if there ever was a place to use this definition of meme it would be… LinguisticMemes, but this is a good second place.






  • d = r/sinΘ

    Human FoV is about 210° with both eyes. Thus Θ is 105°.

    The radius of the sun is 695,508 km.

    Thus, d is 695,508/sin(105) → 720,043 km

    720,043 - 695,508 = 24535 km away from the surface of the sun.

    However, because the FoV is greater than 180°, this is actually below the surface of the sun, and any distance below the surface is enough to fill your vision.

    To completely fill your field of view with the Sun, you’ll need to take a Parker Bath and dip into the sun.



  • And buying that requires knowledge of amazon, knowledge of what phone is useful, knowledge to avoid a scam or faulty product, an email address, a credit card, and a device to order from.

    Children are surprisingly clever and have all the time in the world, but they aren’t professional pen-testers and don’t have the experience needed to use online services before having access to them.

    It’s far more likely they get a hand-me-down device from a friend and keep it at school, especially if they know such a thing would be confiscated immediately upon discovery. Preventing this interaction would require control over the child’s life nearing Amish levels, or prison levels.


  • Tlaloc_Temporal@lemmy.catoScience Memes@mander.xyzWe WALK
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    23 days ago

    What separates species? Oh boy, do I not have an answer for you! We usually don’t have enough fossils to ask that question, and now that we’re cataloging so many fossils it’s starting to bring up questions like this.

    We clearly have two gropus of T.rex skeletons, gracile and robust. Are they different sexes or different species? How about proposed Spinosaurus species, are those just interspecies variation? What about homonin fossils? We can’t even agree on the genus, let alone the species.

    Well forget fossils, what about living species? Plants have shown an amazing ability to hybridize between very distinct groups, and animals can form ring species where two populations can’t interbreed, but can share genes through a string of other populations! How do you classify that‽

    Great yt video on the concept of species if you have 15 minutes.


  • That means we see snakes similarly to the way their predators do.

    From a different perspective, the bee mimic orchid only vaguely looks like a bee to us, but it still successfuly tricks bees, so image accuracy isn’t the only factor. Both mimics can give us interesting insughts into how other animals see the world.


  • And my mates Ceres and Sedna! And Orcus, Makemake, Haumea, Eris (which started this whole deal), Gonggong, Quaoar, Salacia, Leleākūhonua, and at least 40 undiscovered Sednoids. Vesta, Pallas, Hygeia, and Interamnia probably counted at one point too!

    At some point it stops being gatekeeping and is just another kingdom entirely.