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C. elegans Can Pass a Trait Down for 100 Generations…Without #DNA ! Mysteries of the #Universe

C. elegans Can Pass a Trait Down for 100 Generations…Without #DNA ! Mysteries of the #Universe | Limitless learning Universe | Scoop.it

C. elegans worms whose grandparents had the ability to fight viruses using a fleet of tiny RNA molecules retain these molecules even when they don’t have the genes for them. They can pass these molecules down for more than a hundred generations.

 

A research team engineered worms that didn’t have the genes to make the RNAs—which work by inhibiting the virus replication machinery—and then bred them with worms that did for several generations. They ended up with some worms whose ancestors had had the virus-fighting molecules, but did not themselves possess the necessary genes. The team then watched these worms under the microscope and saw that they still attacked viruses in exactly the same way as their grandparents.

 

Numerous control experiments confirmed that the effect was real, and only happened in worms who had ancestors with the genes. The researchers collected all the various RNA molecules in these worms and saw that indeed, they possessed the virus-fighting variety.After about three generations, the effect seemed to wear off; most worms without the genes stopped being able to attack viruses. But for some worms, it never stopped. The team bred those worms for more than one hundred generations, nearly a year, and the creatures never flagged in their ability to defend themselves.

 

How is this possible? The team keeps mum on any ideas of how this inheritance works. But they do uncover some tantalizing details that give us room for speculation. One possibility is that the RNA molecules made by the original worms in response to a virus attack were floating around in the cytoplasm of the eggs and sperm that became their offspring. If that’s the case, then the offspring are basically using their parents’ leftovers, with each generation having a bit less of the original stuff.

 

The researchers mention this possibility of the original RNA being “diluted” with each generation, but don’t, as far as we can tell, try to test that.But what about the worms that hang on to the RNA indefinitely? The researchers found that for that to happen, a particular enzyme that builds RNAs has to be present. Maybe, then, these worms manage to jerry-rig a way to make copies of the virus-fighting RNA with that enzyme (which isn’t part of the usual machinery), even though they lack the gear required to make it in the normal fashion. The gene for that enzyme would then be passed on as normal.


Via Sakis Koukouvis, Dr. Stefan Gruenwald, CineversityTV
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Clean energy generated using #bacteria-powered #solar panel #renewables #science

Clean energy generated using #bacteria-powered #solar panel #renewables #science | Limitless learning Universe | Scoop.it
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#reverie Intelligent machines might want to become biological again – Caleb Scharf | Aeon Essays

Intelligence could have been moving back and forth between biological beings and machine receptacles for aeons
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#caldera #Yellowstone... Snake River Plain’s #volcano is a MUCH BIGGER threat to #America

#caldera #Yellowstone... Snake River Plain’s #volcano is a MUCH BIGGER threat to #America | Limitless learning Universe | Scoop.it
FOR those that thought Yellowstone super-volcano was one of the biggest natural threats to the USA, think again.
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20 Places In #India More Mysterious Than The #Bermuda Triangle

20 Places In #India More Mysterious Than The #Bermuda Triangle | Limitless learning Universe | Scoop.it
Here's a list of the mysterious places in India that you probably didn't know exited. Magnetic Hill, Karni Mata Temple, Bullet Baba Shrine, Hanging Pillar.
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Even with no #brain, slime molds quickly learn bitter lessons #biology #science

Even with no #brain, slime molds quickly learn bitter lessons #biology #science | Limitless learning Universe | Scoop.it
You don’t need a brain to learn something new – not if you’re a slime mold, anyway. Scientists who watched Physarum polycephalum search for food found that the slime mold could learn to ignore certain chemical threats.
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What #scientists learned when they bribed #babies with crackers #science #psychology

What #scientists learned when they bribed #babies with crackers #science #psychology | Limitless learning Universe | Scoop.it
Humans appear to have a strong and innate sense of fairness. When somebody cheats other people, breaks the rules or otherwise behaves badly, we instinctively tend to try to avoid dealing with them, psychological research suggests.
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#Ayurveda: The Art of Being Full Movie

Watch Ayurveda: The Art of Being Click Here http://moviestream4u.net/search/Ayurveda:+The+Art+of+Being
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Huge never-before-seen lake spotted hiding under #Antarctic ice #biology #history #science

Huge never-before-seen lake spotted hiding under #Antarctic ice #biology #history #science | Limitless learning Universe | Scoop.it
The subglacial lake is second in size only to Lake Vostok, but much nearer to research stations, making it easier to hunt there for new life forms
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#Zika: Worse than we thought? #Harvard #Health #medicine #science #biology

#Zika: Worse than we thought? #Harvard #Health #medicine #science #biology | Limitless learning Universe | Scoop.it
Emerging information on the Zika virus suggests it may be a bigger problem for the United States than experts originally thought.
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#Apes Can Solve Some #Brain Puzzles Faster Than Humans #biology #science

#Apes Can Solve Some #Brain Puzzles Faster Than Humans #biology #science | Limitless learning Universe | Scoop.it
Excerpted from Are We Smart Enough to Know How Smart Animals Are? by Frans de Waal, to be published on April 25 by Norton. One morning, at the Dutch Z
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Artificial #muscle can heal itself #medicine #robotics #cyborg #skynet #science #tech

Artificial #muscle can heal itself #medicine #robotics #cyborg #skynet #science #tech | Limitless learning Universe | Scoop.it
Elastic polymer could be used in robotics and prosthetics
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Elon #Musk Debuts the #Tesla Powerwall way too expnsive for what it delivers #tech #science #renewables

Tesla Powerwall Keynote by Elon Musk "The Missing Piece" English and Spanish subtitles added, credit to Luis Gámez for transcribing and translating.
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Tantric Practice #meditation #health

Tantric Practice #meditation #health | Limitless learning Universe | Scoop.it
Dharma Collection — books, lectures, pictures, audio, video ☢ promienie

Via promienie
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promienie's curator insight, April 16, 2:09 PM
#Buddhism · Elements of #Tantric #Practice — by Jamgon Kongtrul - The Treasury of Knowledge - vol. 8
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Interesting theory Did #Asteroid Impacts Incubate #Mars #Ancient #Oceans? #astronomy #space

Interesting theory Did #Asteroid Impacts Incubate #Mars #Ancient #Oceans? #astronomy #space | Limitless learning Universe | Scoop.it
A bombardment of asteroids on a once-icy ancient Mars may have created vast oceans of liquid water, which persisted for 200 million years.
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Professor Stephen #Hawking believes black holes are hiding an amazing secret #theory #astronomy

Professor Stephen #Hawking believes black holes are hiding an amazing secret #theory #astronomy | Limitless learning Universe | Scoop.it

Celebrated physicist claims great destroyers could have hidden 'back doors' which open to a parallel universe
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#Neuroscientists create ‘atlas’ showing how words are organised in the #brain

#Neuroscientists create ‘atlas’ showing how words are organised in the #brain | Limitless learning Universe | Scoop.it
Using brain imaging, scientists have built a map displaying how words and their meanings are represented across different regions of the brain
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Despite their small brains, #ravens are just as clever as #chimps #biology #science

Despite their small brains, #ravens are just as clever as #chimps #biology #science | Limitless learning Universe | Scoop.it
A study led by researchers at Lund University in Sweden shows that ravens are as clever as chimpanzees, despite having much smaller brains
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#Lightroom #Mac vs #PC Speed Test | $4k iMac vs $4k Performance Test PC clear winner #tech #science #Apple

#Lightroom #Mac vs #PC Speed Test | $4k iMac vs $4k Performance Test PC clear winner #tech #science #Apple | Limitless learning Universe | Scoop.it
With so much time spent in post processing, powerful computers are a necessity, so we pitted an equally-priced Mac Vs. PC to see which is the best performer.
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On the Evolution of the Mammalian #Brain #biology #Neuroscience

On the Evolution of the Mammalian #Brain #biology #Neuroscience | Limitless learning Universe | Scoop.it
Hobson and Friston have hypothesized that the brain must actively dissipate heat in order to process information (Virtual reality and consciousness inference in dreaming. Front Psychol. 2014 Oct 9;5:1133.). This physiologic trait is functionally homologous with the first instantation of life formed by lipids suspended in water forming micelles- allowing the reduction in entropy (heat dissipation), circumventing the Second Law of Thermodynamics permitting the transfer of information between living entities, enabling them to perpetually glean information from the environment (= evolution). The next evolutionary milestone was the advent of cholesterol, embedded in the cell membranes of primordial eukaryotes, facilitating metabolism, oxygenation and locomotion, the triadic basis for vertebrate evolution. Lipids were key to homeostatic regulation of calcium, forming calcium channels. Cell membrane cholesterol also fostered metazoan evolution by forming lipid rafts for receptor-mediated cell-cell signaling, the origin of the endocrine system. The eukaryotic cell membrane exapted to all complex physiologic traits, including the lung and brain, which are molecularly homologous through the function of neuregulin, mediating both lung development and myelinization of neurons. That cooption later exapted as endothermy during the water-land transition (Torday JS. A Central Theory of Biology. Med Hypotheses. 2015 Jul;85(1):49-57), perhaps being the functional homolog for brain heat dissipation and consciousness/mind. The skin and brain similarly share molecular homologies through the ‘skin-brain’ hypothesis, giving insight to the cellular-molecular ‘arc’ of consciousness from its unicellular origins to integrated physiology. This perspective on the evolution of the central nervous system clarifies self-organization, reconciling thermodynamic and informational definitions of the underlying biophysical mechanisms, thereby elucidating relations between the predictive capabilities of the brain and self-organizational processes.
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#Robot #tech #gadget #science cool.

#Robot #tech #gadget #science cool. | Limitless learning Universe | Scoop.it
RC & Model Technologies posted this video on 2016-04-10. 1391 likes. 34 comments. 2240 shares.
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New state of water molecule discovered #Emoto #science #physics #tech

New state of water molecule discovered #Emoto #science #physics #tech | Limitless learning Universe | Scoop.it
Neutron scattering and computational modeling have revealed unique and unexpected behavior of water molecules under extreme confinement that is unmatched by any known gas, liquid or solid states.

Via Mariaschnee
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#NASA has detected a burst of light that might be linked to one of the most monumental #space discoveries ever made

#NASA has detected a burst of light that might be linked to one of the most monumental #space discoveries ever made | Limitless learning Universe | Scoop.it
Less than half a second after LIGO detected gravitational waves, the Fermi Telescope picked up a brief signal from the same region of space.

Via Mariaschnee
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Study backs pancreas cell transplants for severe #diabetes #medicine #health

Study backs pancreas cell transplants for severe #diabetes #medicine #health | Limitless learning Universe | Scoop.it
Transplants of insulin-producing pancreas cells are a long hoped-for treatment for diabetes — and a new study shows they can protect the most seriously ill patients from a life-threatening complication of the disease, an important step toward U.S.
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A gate-tunable single-molecule #diode #Nanoscale #computer #tech #science

A gate-tunable single-molecule #diode #Nanoscale #computer #tech #science | Limitless learning Universe | Scoop.it
In the pursuit of down-sizing electronic components, the ultimate limit is the use of single molecules as functional devices. The first theoretical proposal of such a device, predicted more than four decades ago, is the seminal Aviram–Ratner rectifier that exploits the orbital structure of the molecule. The experim
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Paralyzed Man Bypasses Arm Nerves to Move Hands with His #Brain #neurobiology #science #medicine

Paralyzed Man Bypasses Arm Nerves to Move Hands with His #Brain #neurobiology #science #medicine | Limitless learning Universe | Scoop.it
After a broken neck left him quadraplegic Ian Burkhart was told he would never be able to use his hands. Now he can grasp a bottle and pick up a credit card by using a computer plugged directly into his brain. Special software is able to decode his thoughts and convert them into electrical signals in his hand, bypassing the damaged nerves in his spine. Now Ian has regained an amazing degree of control over his hand, each movement stimulated by his own thoughts.

This video was reproduced with permission and was first published on April 13, 2016. It is a Nature Video production.
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