#biology

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For World Jellyfish Day I am sharing self-taught trail-blazing Irish #marineBiologist Maude Delap (1866 – 1953), 1st to successfully breed jellyfish in captivity & document their full lifecycle. She is surrounded by blue #jellyfish (Cyanea lamarckii) life stages based on her diagrams. Born 7th of 10 kids to Rev Alexander & Anna Jane Delap in County Donegal, her family to Valentia Island when she was 8. Sisters Maude & Constance were encouraged in their interest in #biology & #zoology by their 🧵
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I did not have this find on my bingo card for the year... ...Deep in a cave in Tennessee, thousands of feet underground, as I rounded a bend of the river passage leading a group of biology students and recent graduates in a bioinventory of the cave....I stopped suddenly and definitely swore a little "WTF is that?! GAR!?" Yes my friends, a friggin' Gar, about four feet long, just swimming in one of the pools. Not a single person I know of has ever seen this in a cave before. Critters from the surface do get washed in at times, and this cave has connection to surface water. However, the creeks above it are not really Gar habitat, so even us biologists are at a bit of a loss. Well, not the property manager, who promptly said "wow, he was only this big *mimes a few inches with his fingers* when I put him in there!" (sarcasm, in case you cannot tell!) So...enjoy a big gar, with a human for scale. Fun fact: it would follow the light from our headlamps around, like a little kitten following a feather toy, but it declined to follow out of the pool it is comfy in Boost if this made you smile today! (ETA: Please don't at me to yell at me about not "saving" it, or ignoring that fish have feelings, or anything along those lines. Floods wash things into caves. Critters explore where maybe they shouldn't. There's a song in the Lion King about it. Sometimes we can rescue things out of caves that belong on the surface, but often we cannot, and for millions of years these accidentals feed the ecosystem, and support many of the other creatures that call this cave home. If you struggle with this concept: Think of it as colonization gone array so the locals win in the end.) #fish #gar #monster #cave #caves #caving #biology #nature #shock #river #ecosystem #Mesozoic #ancient #history
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🦟 A mosquito bite may vanish in moments, yet its story unfolds beneath the skin. Why can a turning point arrive as the fever fades? ✍️ Follow the science beyond the bite: https://www.theperpetuallycurious.org/dengue/ A small encounter can reveal a hidden world. #Dengue #Biology #Health #Mosquito #ThePerpetuallyCurious
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10/ 2. The "Olive Oil" Cell Membranes

At 5 kilometers deep, the ocean is not only heavy but freezing cold. Under those conditions, the fats in normal animal cell membranes would pack tightly together and turn solid, like a stick of butter left in the fridge. To prevent their cells from turning into stiff, brittle walls that would easily rupture, deep-sea creatures build their cell membranes with massive amounts of unsaturated fatty acids.

#oceans #biology #MarineLife

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11/ This keeps their cellular boundaries fluid and flexible—acting more like liquid olive oil than solid butter.

  1. Chemical Scaffolding (Piezolytes)

Even if your body doesn't crush, extreme hydrostatic pressure can literally force water molecules into the folds of your enzymes and proteins, warping their shape so they stop working.

#science #biology

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12/ Deep-sea animals combat this by packing their tissues with specialized molecules called piezolytes (the most common being TMAO, or trimethylamine oxide). These molecules act like microscopic scaffolding. They bind to water molecules and hold proteins in their proper three-dimensional shape, preventing the sheer weight of the ocean from squashing the animal's biochemistry. #science#biology#marine
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Comb jellies are biological wonders: ctenophores are illuminating how the first nervous systems evolved and how bioluminescence works https://www.quantamagazine.org/ctenophores-arent-just-beautiful-theyre-biological-wonders-20260916/ Quanta Magazine examines ctenophores - the iridescent comb jellies often overlooked in favour of jellyfish - and explains why they are transforming scientific understanding of nervous system origins a #science #biology #evolution
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