I teach biology via animations. #evolution #genetics #biochemistry

Earth
Joined June 2012
Stated Clearly - Jon Perry retweeted
Honey bees inject venom with a two-stroke stinger. Learn more: scim.ag/4yXrVF5 @NewsfromScience
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Out today in @nature.com: our review on how single cells evolve into multicellular organisms, with Ozan Bozdag, @kai_tong_mc25, Peter Yunker, and Matt Herron. rdcu.be/9ZuiKow9twKa For an overview, check out the video below.
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Stated Clearly - Jon Perry retweeted
How do bacteria build their flagella? We’ve put together an animation of Salmonella flagellum assembly based on cryo-EM and X-ray structures. From the membrane-embedded machinery to the growing filament, here’s how the parts come together, step-by-step.
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Somehow I had never seen a bumblebee pollinate a passionflower before! 🐝 Look how much pollen collects on her back as she drinks the nectar: the gap in the flower that she’s moving through looks perfectly tailored to the body of a large bee. You can imagine that a smaller thing like a honeybee might visit to drink the nectar without actually catching any pollen and therefore would not be an effective pollinator of this plant.
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Stated Clearly - Jon Perry retweeted
The idea that #whales (cetaceans) are deeply nested within #Artiodactyla is well supported by molecular, fossil and anatomical data. Cetacea is part of Artiodactyla. Some molecular biologists have wrongly thought that this discovery warrants a renaming of Artiodactyla, and... 1/n
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Stated Clearly - Jon Perry retweeted
Some bee species can look very similar but be completely different behaviourally. 🐝 The Ivy Bee and the Honeybee are good examples of this. If you’re not looking closely you might not realise they are different. They are around the same size, and you can see a lot of both species foraging together on the ivy at this time of the year (see the second image). The best ways to tell them apart are that the Ivy Bee has very clear sharp bands of bright yellow on its abdomen. The Honeybee has hairy eyes while the Ivy Bee has smooth. Honeybees live in colonies with queens and workers. The one pictured here is a sterile female worker who will be collecting pollen to provision the queen’s brood. Thousands of other workers will be out collecting pollen for the same brood. These workers do not reproduce themselves. In contrast, Ivy Bees are solitary, don’t live in colonies, and don’t have queens or workers. The bee pictured here is a female who is independently collecting pollen for her own brood. She has no help in this process, even from the male she mated with.
A female Ivy Bee collecting ivy pollen for her brood. 🌿 This bee species is very specialist and only collects pollen from ivy so its adult stage perfectly coincides with the short window of ivy flowering season in autumn. The males don’t collect pollen because they don’t provision the brood, though you can still see them visiting the ivy to drink nectar and try to find a mate.
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Stated Clearly - Jon Perry retweeted
Nature has just published a pretty incredible paper. The authors introduce a framework that turns research papers into interactive AI agents. Rather than engaging with a paper only as static text, researchers can question its agent, ask it to reproduce an analysis, or apply the paper’s methods to new data. This could make research methods much easier to understand, reproduce, and use. It also opens up a strange possibility: research papers that can, in a sense, talk to one another. The authors demonstrate this by connecting agents derived from different papers so that they can combine their methods and data. Used carefully (and with human scientific judgment still firmly in the loop) this could become a powerful new form of scientific communication. * Full paper in the first reply
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Passe-science a maintenant un site web! passe-science.fr/ Son objectif: - améliorer le referencement google - meilleur accès au contenu, fonction recherche, sources, et transcriptions - tester Codex + GPT qui a tout codé
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Stated Clearly - Jon Perry retweeted
My colleague @edo_gia will present his recent work on the origins of life. I’ll be hosting. Come join us!
The PCE3 Seminar Series is back! Join us on September 15th at 12 p.m. EDT/9 a.m. PDT. Dr. Edoardo Gianni from the MRC will discuss directed evolution of RNA for self-replication, with an introduction by PCE3 co-lead Karyn Rogers. prebioticchem.org/seminar-se…
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Stated Clearly - Jon Perry retweeted
another joyful student of statistical mechanics. rip.
One with more balls (someone may have done this before). → bleuje.com/js_sketches/brick…
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Stated Clearly - Jon Perry retweeted
I have been really fixated on planarians recently. I’ve been staying in Wales and the damp rainy climate is perfect for these land flatworms. They must have been introduced to the UK with imported plants because these are from New Zealand and Australia originally. I found three different species so far!
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Stated Clearly - Jon Perry retweeted
Imagine the headlines if cats started making nets to catch birds. Spiders do the equivalent every day but almost no one even spares a second to look. Is it because they are small or because we become indifferent to what is normal? The fact that it exists and is common does not make it any less amazing.
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おは恐竜!!
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Thanks to my buddy Cheryl Hudson for passing on this amazing story...
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How many people know what a baby bee looks like? 🐝 They don’t look like smaller versions of the adults, but like tiny, featureless larvae. This is the larva of a Red Mason Bee in its chamber along with a store of ‘bee bread’ that its mother left for it.
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Stated Clearly - Jon Perry retweeted
"It’s fundamentally naive to look at the Pyramids, see that they’re really big and then conclude, “I couldn’t even lift those stone blocks with my friends helping; therefore, aliens had to do it.” - Carl Sagan
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Stated Clearly - Jon Perry retweeted
Also, all ancient cultures knew this, and it was lost to apostasy
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"We show that, in TTC-A, steric clash between ribosome and RNAP upon ribosome 30S head swiveling inhibits 30S head swiveling, consistent with translation slowdown, and applies mechanical force to the trailing edge of RNAP, causing transcription termination."
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Stated Clearly - Jon Perry retweeted
there’s an entirely different world out there that birds get to experience
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Claude Code watching me write code manually
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