how i learned about tropical geometry the hard way as an ecologist
the longer i read this book the more insane it gets
this is WORLDS FIRST 3D PHASE DIAGRAM
this is a STICKBUG
this is a TROPICAL PLANE
get me out of here. i want off this ride

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@stickman-on-a-stick
how i learned about tropical geometry the hard way as an ecologist
the longer i read this book the more insane it gets
this is WORLDS FIRST 3D PHASE DIAGRAM
this is a STICKBUG
this is a TROPICAL PLANE
get me out of here. i want off this ride
I think they should have a version of F1 with no drivers. All the cars are remote-controlled, and as such, the only goal becomes “build the fastest car imaginable”. The only rules are that it must be a CAR, so no aircraft, and you’re not allowed to endanger any living breathing human beings with your wacky engineering shenanigans.
I’m imagining rockets on wheels leaving trails of melted rubber in their wake. That sort of thing.
Basically, battlebots in the heart of Monaco at mach one.
I have good news for you
Unfortunately not a real sport yet, but to solve that you just need some prize money and an eager group of college students
How much jello would it take to collapse into a black hole?
Hypothetically, of course.
The radius of a sphere of some density, D, and mass, m, is given by
and the sphere’s Schwarzschild radius is given by
where G is the gravitational constant, and c is the speed of light. Once the Schwarzschild radius is bigger than the radius of the sphere, it will collapse into a black hole. I have put these equations into Desmos, letting you put in any substance’s density to find how much of it you will need to create a black hole. Go wild.
But, to answer your question: Plugging in the density of jello (about 1141.22 kg/m^3 [Source]) you would need about 2.53x10^38 kg, forming sphere of roughly 3.76x10^8 km. In slightly more palatable units, the Jello Sphere would have the mass of 127 million suns and, if placed at the center of the solar system, would engulf Mercury, Venus, the Earth, and Mars, and would extend about halfway to Jupiter [Source 2].
Note that this calculation is simplified, as in reality, the Jello Sphere would be crushed by its gravity, increasing its density and thus requiring less mass to form a black hole. To play it safe, though, the above number guarantees black hole formation, and you can take home the leftovers.
Thank you Science Side of Tumblr
l figured out how to factor in the collapse of the Jello Sphere, and it doesn’t even require any math!
A star goes supernova when the outward force of nuclear fusion becomes too weak to hold up the mass of the star, at which point the stronger, inward force of gravity causes collapse. Then, if the star’s mass is large enough (about 20 solar masses [Source 3]) it collapses so much that it forms a black hole. As it turns out, our Jello Sphere would be in remarkably similar conditions to a dying star - since Jello does not regularly undergo nuclear fusion [citation needed], gravity would cause the Sphere to collapse and go supernovae just like a star would. So the final answer:
For instantaneous, clean black hole formation, use 127 million solar masses of Jello.
For cheap, messy, and explosive black hole formation, you only need about 20 solar masses.
Dell wrote a letter to you!
This is actually incredibly impressive; I graphed it in desmos so you can appreciate its glory (along with a step by step breakdown of how it works!)
Okay this might be incredibly specific but… kindergarten teacher McCoy.
Trapped them in the white void!!!!!!!
In an alternate world: “I’m a kindergarten teacher, not a doctor!”
Hi! What’s the weirdest/most out there song you listen to? For me it’s probably this https://youtu.be/tyneiz9FRMw?si=ThzYGfarEO9IrsiA
oooh good question! mine is probably this
How could you do this to me /j
space jam DVD space jam DVD space jam DVD space jam DVD space jam DVD space jam DVD space jam DVD space jam DVD space jam DVD space jam DVD space jam DVD space jam DVD space jam DVD space jam DVD space jam DVD space jam DVD space jam DVD space jam DVD space jam DVD space jam DVD space jam DVD space jam DVD space jam DVD space jam DVD
im getting the vibe, and correct me if im wrong here, that you may be excited about a space jam dvd
how the hell did this pass 1k notes
When I was a kid, my mom bought me a little potted cactus from a nursery. When we were checking out, the cashier (who seemed very knowledgeable about plants) noticed me eyeing it. I wanted to pet the cactus so bad, and it was probably written all over my face. It just looked so fuzzy! So you know what the cashier does? She reached out…
and she ran her fingers along the spines of the cactus! She pet the cactus! But get this: to my amazement, she pulled back her hand back, completely unharmed and unfazed, saying “actually, you can pet this one.” That’s right, a small, hand sized cactus that you could pet!
Unfortunately, a few years later the cactus died of neglect, but I certainly enjoyed petting it in front of my clueless friends and watching them gasp in horror.
(P.S., could someone identify the cactus so I could get another? It had a single stalk, and was cylindrical with a rounded top. It had short and thin yellow, or maybe yellowish-white, spines, which were evenly and individually distributed throughout the cactus’s surface, enough to be considered a light fuzz. It was about the size of your curled fingers when making a thumbs up. When it died I broke it open, and it was made of solid rings of plant material.)
could it potentially be the ladyfinger cactus, Mammillaria elongata?
That’s the right sort of shape, but the spines were not in clumps like that- each spine was more or less by itself, and they were pointed outwards.
how the hell did this pass 1k notes
When I was a kid, my mom bought me a little potted cactus from a nursery. When we were checking out, the cashier (who seemed very knowledgeable about plants) noticed me eyeing it. I wanted to pet the cactus so bad, and it was probably written all over my face. It just looked so fuzzy! So you know what the cashier does? She reached out…
and she ran her fingers along the spines of the cactus! She pet the cactus! But get this: to my amazement, she pulled back her hand back, completely unharmed and unfazed, saying “actually, you can pet this one.” That’s right, a small, hand sized cactus that you could pet!
Unfortunately, a few years later the cactus died of neglect, but I certainly enjoyed petting it in front of my clueless friends and watching them gasp in horror.
(P.S., could someone identify the cactus so I could get another? It had a single stalk, and was cylindrical with a rounded top. It had short and thin yellow, or maybe yellowish-white, spines, which were evenly and individually distributed throughout the cactus’s surface, enough to be considered a light fuzz. It was about the size of your curled fingers when making a thumbs up. When it died I broke it open, and it was made of solid rings of plant material.)
dad dad dad dad dad do you know anyhthingbsbout sharks
yes but im too tired to think rn
lemon shark babies grow up in mangrove pools because the adults are too big to fit in between the roots so its safer for them
One time I spent 4 hours of what should have been sleep time researching the evolutionary age of sharks instead. Enjoy!
Fun Fact:
Sharks first came into existence ~400-450 million years ago. This is nearly unfathomably old, so here’s some comparisons:
In geography, sharks are older than:
The Atlantic Ocean, which formed when Pangea split ~150 million years ago
Pangea itself, which formed through the collision of Gondwana and Laurussia ~330 million years ago
And possibly, the Tethys Ocean; the ocean that was between Gondwana and Laurussia before they formed Pangea
In biology, sharks have been around:
1,800 times longer than homo sapiens, who evolved ~250,000 years ago
Before trees, which evolved ~385 million years ago
Before the first land vertebrates, which evolved ~390 million years ago
Almost as long as plants, which first evolved ~500 million years ago
Half as long as the first animals, which evolved ~800 million years ago- this means the first sharks are likely closer to the evolution of the FIRST EVER ANIMALS than they are to modern times (disclaimer: we don’t really know when the first animals evolved, but upwards of 600-800 million years ago seemed to be somewhat agreed upon from what I read)
Sharks have survived 4, or possibly all 5, of the biggest mass extinction events, as listed by the American Museum of Natural History (https://www.amnh.org/exhibitions/dinosaurs-ancient-fossils/extinction/mass-extinction):
Ordovician-silurian Extinction: 440 million years ago.
Devonian Extinction: 365 million years ago.
Permian-triassic Extinction: 250 million years ago.
Triassic-jurassic Extinction: 210 million years ago.
Cretaceous-tertiary Extinction: 65 million Years Ago
In astronomy, sharks:
Have existed for just under 10% of the Earth’s 4.6 BILLION year life span
Are 6 times older than the North Star, Polaris, which formed around 70 million years ago
Are upwards of 40 times older than the rings of Saturn, which formed around 10 to 100 million years ago (https://science.nasa.gov/missions/cassini/nasas-cassini-data-show-saturns-rings-relatively-new/)
Have orbited the Milky Way almost twice now, with one full orbit taking 230 million years
Have travelled 345,000 light years while orbiting the Milky Way (calculated based on data from https://starchild.gsfc.nasa.gov/docs/StarChild/questions/question18.html)
Other sources: Wikipedia, Google (take exact numbers with a grain of salt. Though, many of the relative comparisons should still hold up even with a few million years of error)
my friend has Death Stairs they are so thin and steep and the spacial awareness is not being very spacially aware and im probably overstimulated and im so tired
oh god i hate those kinds of stairs. they scare me
If you trust the floor’s cleanliness and your friend’s non-judgmentality enough, you can try going up on all fours; I find it really helps. Still haven’t figured out a good way to go down though.
I love hearing about the vibes I give off cause I honestly have no idea
Anonymously message me what vibes I give off and why you think that
There is something oddly heartwarming about an old calculator; one that you’ve used until the button labels have worn away. Handed to anyone else, it would be entirely unusable. No one else could understand it, and even your own memory of what the buttons once said has long since faded. And yet, you pick it up just as you always have, and as you settle down into your latest problem, your fingers move and begin to type- their own sorts of memories guiding them over the speckles of paint that once formed symbols. And, with a final click on a key long since rendered bare, the calculator displays its answer, as faithful as it always has been. How many problems has this calculator solved? Hundreds? Thousands? As you reach for another piece of scratch paper, you are filled with an odd sense of determination.
i love spreadsheets so much you guys don't even understand
Spreadsheets are the ideal incarnation of the classic CS axiom: “Why spend 5 minutes doing it when you can spend 5 hours automating it?”
Quantum Entangled Lovers
A couple who wants to be gay, but neither cares what pronouns people call them. So, their gender is in a superposition of all possibilities, until someone genders one of them, at which point the superposition collapses and the other’s gender is determined to maintain gayness.
the cashier at barnes & noble just gave me this duck at checkout and they said “i give these to children and people with a certain vibe.”
floored to know something about me aligns with this duck
This is the same kind of duck my beloved wife stole from work to hide in my car.
Since then I’ve seen them at the county court, the mall, and on several desks. Where are they coming from???
Back in high school, I had a friend who bought several packs of squeaky rubber ducks for really cheap at the dollar store. I never actually saw them all at once (you can only fit so many ducks in your pockets, after all), but I’m sure there must have been at least 20-30 of the guys, maybe even more. And they weren’t quiet, either: a good, hard squish could get loud enough to cause discomfort for anyone leaning in too close. Which was entertaining enough, but the real kicker is this: my friend was quite generous. And we were in high school. See where this is going? Soon, whole friend groups were armed with their own rubber ducks, and for the next week or two I would hear the *WEE WAAH* calls of plastic ducks, reverberating through the hallways, and I would think to myself, “Ahh, the glorious work of the Duck Dealer.”
Here is a haiku I made in English class featuring two of the ducks:
the cashier at barnes & noble just gave me this duck at checkout and they said “i give these to children and people with a certain vibe.”
floored to know something about me aligns with this duck
This is the same kind of duck my beloved wife stole from work to hide in my car.
Since then I’ve seen them at the county court, the mall, and on several desks. Where are they coming from???
Back in high school, I had a friend who bought several packs of squeaky rubber ducks for really cheap at the dollar store. I never actually saw them all at once (you can only fit so many ducks in your pockets, after all), but I’m sure there must have been at least 20-30 of the guys, maybe even more. And they weren’t quiet, either: a good, hard squish could get loud enough to cause discomfort for anyone leaning in too close. Which was entertaining enough, but the real kicker is this: my friend was quite generous. And we were in high school. See where this is going? Soon, whole friend groups were armed with their own rubber ducks, and for the next week or two I would hear the *WEE WAAH* calls of plastic ducks, reverberating through the hallways, and I would think to myself, “Ahh, the glorious work of the Duck Dealer.”