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Digital Natural Archive(DNA) Nature news, research, discoveries, facts and stories in different biological epochs, developments in the field of biology conducted by scientists from all over the world. Humor
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Caterpillars sense predators by the electric field!
Scientists from the University of Bristol have discovered that caterpillars recognize approaching wasps by changes in the electric field in the air.
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🔍 How does it work?
🟠 Wasps build up a charge (up to +8.8 pKl) during flight.
🟠 Caterpillars detect these fields with sensitive hairs (sensory bristles).
🟠 The hairs vibrate at the frequency of wasp wingbeats (180 Hz), triggering a defense response:
Curling up in a ball.
Shivering or attempting to bite the 'threat'.

✔️ Why is this important?
This is the first evidence of electroreception in terrestrial prey to detect predators.
The mechanism may be common in other insects.
Anthropogenic electromagnetic fields (power lines, machinery) can disrupt this system, disorienting caterpillars.
“Nature endowed caterpillars with “electrosensors” long before humans invented radar!”
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📝The article was published in the journal PNAS. DOI: 10.1073/pnas.2322674121.
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#facts #animals #insects
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Dire wolf or high-profile PR? A scientific breakdown of the sensation
Colossal Biosciences has claimed to have “resurrected” the dire wolf (Aenocyon dirus), but biologists are sounding the alarm
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🔬 Facts vs. PR
- The real “dire wolves” went extinct 13,000 years ago and were genetically NOT wolves (split from the canine species 5.7 million years ago)
- The company used the DNA of a normal wolf with only 20 edits (for comparison, the differences between humans are thousands of mutations)
- Genes for “similarity” were taken from modern wolves, not from fossilized specimens

🔍 Suspicious details
No publications of the research in scientific journals
The startup's stock (with no actual products) was valued at $10.2 billion
Loud headlines in Time and The New Yorker in the absence of evidence

⚠️ Conclusion: what we have before us is not a species revival, but a wolf hybrid with a marketing additive.
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#facts #animals #mammals
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Family photo!
🦉 The rabbit owl is a day owl with unusual habits!
This miniature long-legged owl (23 cm) lives in America.

Features:
Lives in burrows in open landscapes
Active during the day (rare for owls!)
Collects dung in nests to lure beetles 🐛

🎨 Coloring: Red-gray with white speckles and bright yellow eyes.
#humor #animals #birds
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🐛 Mini wars on the tips of leaves!
Canadian scientists have discovered that Falcaria bilineata moth caterpillars are having real battles over a territory the size of a pinhead!
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🔊 How does it work?
- Threatening Vibrations: After occupying the edge of a leaf, the caterpillar “drums” and scrapes the surface, creating the signal, “Mine!”.
- Insurance: If an enemy approaches - descends on a silken thread, avoiding a collision.
- Deception: Suspect the caterpillars mimic the spiders vibrations to intimidate opponents!

📌 Amazing Facts
✔️ Warriors from birth: Even 2-millimeter larvae take up positions immediately.
✔️ 14-fold anger: Vibrations increase 14 times faster at close incursions!
✔️ No Fights: 55% of the time, “intruders” back away from sound signals.

Why it matters
It used to be thought that only adult insects had territorial behavior. Now it's clear: fighting for resources starts from the first seconds of life!
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📝 The paper was published in the Journal of Experimental Biology. DOI: 10.1242/jeb.249796.
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#news #animals #insects
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🪐 Life on Titan: tiny aliens under the ice?
Scientists have modeled whether microbes can survive in the subglacial ocean of Titan, Saturn's most mysterious satellite.
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🔍 Facts
- Titan's crust hides an ocean (possibly made of water and methane) beneath its crust.
- Organic compounds from the surface (glycine and others) can enter the ocean through cracks.
- Fermentation is a key process for survival: microbes get energy without oxygen.

📉 The problem
Even if there is glycine, there is too little of it! Modeling has shown:
⚫️ Only a few kilograms of microbes for the whole ocean.
⚫️ Less than 1 cell per kilogram of water.

But there is hope
🟡 Life may exist in colonies at the lower crust.
🟡 Perhaps microbes use other compounds than glycine.

➡️ What's next?
We need new missions to Titan to study organics and test hypotheses!
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📝The article was published in The Planetary Science Journal. DOI: 10.3847/PSJ/adbc66.
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#news #biocosmos
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👑 The face of a Mycenaean princess: a look through 3500 years!
Digital technology has made it possible to see the face of a Mycenaean queen who lived 3500 years ago. Her remains were found in Mycenae, the city of King Agamemnon from the Iliad.
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🔍 What we know
➡️ Age: ~35 years old.
➡️Period of life: 16th-17th centuries BC (300 years before the Trojan War!).
➡️ Buried with a golden mask and three swords - perhaps she was a warrior!

💡 Interesting
🟣 Swords used to be thought of as belonging to men.
🟣 DNA tests showed that it was her brother, not her husband, who was charroned next to her.
🟣 The arthritis in her spine and arms are traces of exhausting weaving, like the mythical Helen of Troy.
🟣“She's incredibly modern... It's like she's looking through the ages,” historian Emily Hauser.

📌 Why it matters
The reconstruction breaks stereotypes: the women of Mycenae could inherit power and bear arms, not just be wives.

📖 Why it matters
Look into the eyes of the past - and see how myths intertwine with reality!
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Reconstruction by digital artist Juanjo Ortega.
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#news #animals #mammals #humans
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🌱 Secrets of fertile soil from Perm scientists!
Tired soil is the cause of poor harvests. How to restore its strength?
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🔍 Signs of soil exhaustion:
- Lumps or dust instead of loose soil.
- Poor yields even with care.
- Lots of weeds, few worms.
- Change in soil color.

🌿 Organic Helpers
Compost - humus from leaves, grass, waste. Improves structure, nourishes plants.
Manure - rich in nitrogen, phosphorus, potassium. Important: compost fresh manure to kill weeds and pathogens.

Siderates (rye, mustard, lupine):
Protect against erosion,
Nitrogen rich,
Suppress weeds and pests.

⚗️ Mineral fertilizers
Needed to make up for deficiencies!
- Apply strictly according to the instructions.
- Feed even in winter: the nutrition will penetrate the soil with melted snow.

🥔 After monocultures - resuscitation
If potatoes have been planted for years:
Loosen the soil.
Add straw, leaves, wood chips.
Plant siderates (mustard, clover) and plow them at a height of 10-15 cm.
Apply complex fertilizers.

🪱 Worms are your best allies
- Biohumus from worms - super fertilizer!
- How to breed worms:
- Dig a ditch (50 cm), protect with netting from moles.
- Fill with organic matter + sand.
- Populate 20 worms → by fall there will be 2000!

🧪 Check the acidity (pH) yourself
Mix the soil with distilled water.
Dip a litmus strip in.
Compare the color to the scale:
- <7 - acidic (add lime),
- >7 - alkaline (add peat or sulfur).

🐛 Pest control
- Wireworm → deoxidize the soil (alkali!).
- Nematodes → plant velvets.
- Snails → sprinkle sand on beds.

🌾 Mulching - protection and nutrition
Use:
- Straw - retains moisture.
- Sawdust - mix with nitrogen fertilizer.
- Needles - for acid-loving plants (blueberries, rhododendrons).
“Healthy soil is a symbiosis of organics, microorganisms and your care” - Maria Kombarova, biologist.
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Based on popular science article on the site naked-science.ru
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#ecology
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🦉 Female long-eared owls glow brighter than males!
Ornithologists have discovered that female long-eared owls (Asio otus) outperform males in fluorescence!
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🔍 Key findings
- Females and adults have more porphyrin pigments in their feathers (glow red in UV light).
- Males and young owls have lower concentrations.
- In large females, pigments are independent of weight - perhaps their levels are maximal.

🌡️ Why is this necessary?
Scientists hypothesize: porphyrins help conserve heat during egg incubation. They were previously found in egg shells for thermoregulation!

💡 Interesting
- Brightly colored feathers are not just a “male thing”! Females have more pigments, which disproves stereotypes.

🔬 What's next?
It takes research to figure out:
✔️ How pigments break down after molting.
✔️ Whether their production is linked to metabolism.
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The article was published in The Wilson Journal of Ornithology. DOI: 10.1080/15594491.2024.2444031.
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#news #animals #birds
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Seahorses are the wonder of the ocean!
These fish (2-30 cm) camouflage themselves among algae by changing color!

🔍 Interesting
- The offspring are bred by the male - up to 1000 fry at a time! 🥚
- Swim vertically thanks to a special bubble.
- They feed like a “pipette”: they suck in crustaceans with water. 🦐

❗️ 30 out of 57 species are on the Red List because of poaching.
#facts #animals #fishes
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Scientists have revealed the secret of the “former algae”! 🧬
Nitzschia (Nitzschia sp.) is a diatom alga that has learned to photosynthesize and turned into a heterotroph!
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A new study in PLOS Biology (DOI: 10.1371/journal.pbio.3003038) has shown how it “cheated” evolution

🔍 What they found
Nitschia stole the PL7 gene from a marine bacterium.
This gene allows it to break down sugars in brown algae (like seaweed).
The gene has changed (mutated) 91 times over millions of years!

🌱 Why is this important?
An example of a unique adaptation: an algae became “herbivorous” by eating other algae.

💡 Interesting
Nitzschia live on brown algae thalloms and use up to 40% of their polysaccharides! Now they look more like protozoa than their photosynthesizing relatives.
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#facts #plants #algae
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🔍 Grave beetle: superhero against superbacteria!
Scientists have discovered that the American grave beetle (Nicrophorus americanus) is not just a rare species, but a potential key to new antibiotics!
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Here's why it's unique
Beetle Features
🟣 Buries animal corpses, creating “meat balls” for larvae.
🟣 Treats prey with antibacterial secretions, keeping it fresh for weeks.
🟣 Withstands lethal doses of neonicotinoids (insecticides) - recovers quickly after “intoxication”!

🔬 Scientific discoveries
- The genome and microbiome (composition of microorganisms inside the insect) of the beetle are being studied to look for detoxification genes and antimicrobial substances.
- Eleven species of bacteria have been discovered in its body, including a new to science!
- Resistance to pathogens (like Staphylococcus aureus) may help fight MRSA and other superbacteria.

❗️ Threats
Despite its survivability, the beetle is endangered due to habitat loss and pesticides. After population rehabilitation, its status was mitigated from “endangered” to “vulnerable” in 2020.

Why it's important
Studying the beetle could lead to a medical breakthrough - creating the next generation of antibiotics!
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The article was published in the journal PLOS One. DOI: 10.1371/journal.pone.0314243.
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#facts #animals #insects #bacteria
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Capybaras in bombshell style! 🐾
In Brazil, capybaras are true masters of swimming! The video shows these cute giants jumping into a lake to escape passersby and the heat.

🔍 Interesting
- Capybaras are the largest rodents in the world (up to 65 kg!).
- They love water: they swim, dive and even sleep in a semi-submerged state!
- They live in packs - it's more fun together!
#facts #animals #mammals
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🔬 The microbiota: why is it important?
There is a whole universe of microorganisms living in each of us - trillions of bacteria, fungi, viruses!
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🟣 The microbiota are the “inhabitants” themselves: gut, skin, lung bacteria. Their composition is unique and depends on diet, lifestyle, ecology.
🟣 The microbiome is the totality of their genes. By studying it, scientists understand how microbes affect our health.

👶 Where do they come from?
Formation begins while still in the womb! 🧬 In 2020, they discovered the microbiome in fetal lungs as early as the first trimester. After birth, bacterial colonies grow rapidly:
1st day: E. coli
2nd: lactobacilli.
3rd: bifidobacteria.
Breast milk and natural childbirth are critical to your baby's healthy microbiota!

💡 What are they good for?
Digest fiber, synthesize vitamins (B, K).
Protect against pathogens, strengthen the immune system.
Influence the brain through the “gut-brain axis”: regulate sleep, appetite, mood.
Control inflammation, metabolism, blood pressure.

❗️ Microbiota imbalance (dysbiosis) is associated with:
Obesity, diabetes, asthma.
Skin problems (acne, psoriasis).
Cardiovascular disease.

How to improve the microbiota?
Nutrition: fiber (vegetables, whole grains), fermented foods (kefir, sauerkraut). 🥦
Probiotics: after antibiotics or stress.
Sports and sleep: moderate exercise, regimen.
Stop bad habits: alcohol, smoking, fast food.

The microbiota is our invisible protector. Take care of it, and it will take care of you!
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By Sber's blog (Habr.com)
#animals #mammals #human #microbes
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🦟 Robot flies: how Drosophila became part of future technology
Scientists have turned Drosophila melanogaster fruit flies into living micro-robots!
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With the help of light and odors they were taught:
🟣 Draw letters (“HELLO WORLD”) along a given route;
🟣 Carry loads up to 1.1 mg (almost as much as their own weight!);
🟣 Work in a swarm to create complex patterns.

How does it work?
🟣 Visual control: a striped pattern projector guides the flies using their natural reflex of moving towards the light.
🟣 Olfactory stimuli: activation of neurons by odors causes flies to turn in the desired direction.

Why it's needed.
⚫️ Searching for survivors in rubble: swarms of flies will be able to penetrate inaccessible places.
⚫️ Environmental monitoring: collecting data on air or soil.
⚫️ Micro-cargo transportation: for example, delivering drugs inside the body.

✔️ Amazing facts
Flies can work for hours without reward (no motivational candy! 🍭).
In experiments, they have traveled distances 200,000 times their body length.

✔️ Что next?
Scientists plan to create “backpacks” with chips to autonomously control flies in the real world. Perhaps the tiny biorobots will soon become our indispensable assistants!
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The study is published in PNAS. DOI: 10.1073/pnas.2426180122.
#appears #animals #insects
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🦦 Beavers are super parents: carry their babies in their paws like humans!

Did you know that beavers carry their cubs as if in a hug? 🥰 Beaver cubs are born with open eyes and thick fur, ready to swim. But even these independent babies need care!

👉 Check out this cutest video of a mom beaver showing touching care. And these “nature engineers” are also saving ecosystems by creating dams and restoring forests
#facts #animals #mammals
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