We're filmmakers working on an AI doc that features developments in the self-driving car industry. Ask us anything!
Switching from unhealthy to healthier diet lowers depressive symptoms more than social support sessions
20 percent of Americans responsible for almost half of US food-related greenhouse gas emissions
Biophysicists have imaged the moment a photon sparks the first energy conversion steps of photosynthesis.
Toddlers learn nothing from YouTube videos. New study finds that two-year-olds enjoy the commercials more than the videos (and seem engaged with musical clips) but do not learn anything from YouTube.
A single intravenous infusion of ketamine led to a rapid decrease in suicidal ideations. Within a day, about 55% of individuals who received ketamine no longer had suicidal ideations compared to 20% who received placebo. This reduction in suicidal ideations lasted for at least 7 days.
Living abroad can clarify your sense of self. They found living abroad increases "self-concept clarity," the extent to which individuals' beliefs about themselves are clearly and confidently defined and consistent and stable over time.
A bat no bigger than a kiwi fruit logs distances of up to 100 kilometres on nightly round trips to its feeding grounds — the longest commute ever recorded for a nectar-feeding bat.
Published this week in the International Journal of Obesity, the study suggests that parents who underestimate the sugar content of everyday foods and beverages commonly included in children’s diets are exposing their children to an increased risk of obesity or overweight.
Read with them, watch with them. Toddlers that co-view with an engaged parent learn more words from videos than those that watch alone.
Using diamond, scientists build first continuous room-temperature solid-state maser - the microwave version of lasers. Possible applications include medical imaging, airport security scanners, improved bomb detection, and quantum computers.
The Effort Paradox: Prominent models indicate that effort is costly, and that we avoid it. A new series of studies show that this is only half the story. Humans and non-human animals alike tend to associate effort with reward and will sometimes select activities because they require effort
3D printer has for the first time combined several printing methods to produce devices out of multiple materials in a single print run. So far the machine has created basic electronic devices, but the technology brings us a step closer to printing complex equipment such as robots or smartphones
Wounds in the fetus can heal without scarring, a fact that has prompted scientists to design new biomaterials based on the properties of fetal skin. Now, a new type of nanofiber has been shown to heal wounds in mice faster and with less scarring than untreated wounds.
Biomimetic Artificial Organelles Implanted into Living Zebrafish Embryos made Functional In Vivo
How deep brain stimulation silenced cravings
Neutron star mergers may create much of the universe’s gold
Artificial Sweetener Splenda Promotes Gut Proteobacteria, Dysbiosis, and Myeloperoxidase Reactivity in Crohn’s Disease–Like Ileitis
Science AMA series: This is Daniel Himmelstein, PhD, and Casey Greene, PhD. We found that the Sci-Hub website has created a pirate repository of nearly all scholarly articles, which will push publishing towards more open models. Ask Us Anything!
New linguistic analysis finds that Dravidian language family is approximately 4,500 years old
Mumps virus outbreaks in Europe and the U.S. are linked to waning effectiveness of the vaccine: the increase in cases are more consistent with the loss of efficacy over time, rather than incomplete protection against an evolving virus. An additional dose, however, may extend protection.
The most sustainable end-of-life option for paper cups used for hot beverages - A new study shows that recycled cups were shown to have a better environmental performance, while digestion and composting resulted in a higher net reduction in CO2 emissions, up to 5.4 kg CO2 eq. per 1000 collected cups
Amygdala Neurons Increase as Children Become Adults; Except in Autism
Reconstructing the genetic history of late Neanderthals
Research shows millions of people across the world are getting the wrong care for low back pain.
The brain scanner you can move around in
Sad and lonely people have the best read on human nature—they are more perceptive than others in understanding how we act in social groups, researchers say
A new study has found that the children of centenarians (people who live to 100 years old or more), who tend to have similar healthy aging patterns and long lives like their parents, are also much more likely than the general population to have a strong sense of purpose.
Do your share: Perception of fair division of housework linked to better sex among married individuals in midlife, according to new research.
The Hidden Footprint of Making All Farms Organic: eliminating synthetic fertilizer, and making up for both the yield gap and the shadow footprint, would require at least an extra Australia-sized amount of land — between 40% and 100% more agricultural land than the amount we use today.
Virus fished from pond cures man’s deadly antibiotic-resistant infection - The clinical success suggests promising strategy for fighting antibiotic resistance, according to a paper published in the journal of Evolution, Medicine, and Public Health.
An MIT-Made Robot Fish Will Study the World's Fragile Coral Reefs Unobtrusively: “You can start duplicating and make several of these robotic fish to use them almost like a network of sensors and cameras,”
More than one in 10 people who have never used class A drugs may have traces of cocaine or heroin on their fingertips, forensic scientists say. The scientists believe the participants became contaminated from banknotes, tables and other surfaces, as reported in the journal Clinical Chemistry.
Researchers discover a naturally occurring genetic variant that reduces the risk of chronic liver disease by up to 74%. A drug attempting recapitulate the effects of the genetic variant in the general population could enter the clinic within a year.
Tiny implants for cells are functional in vivo, Swiss scientists report.
Characterization of EEG signals revealing covert cognition in the injured brain
Use of brain diffusion tensor imaging for the prediction of long-term neurological outcomes in patients after cardiac arrest
Experiments that ask children to draw a researcher show a greater proportion of women in sketches over time. In the 1960s and 1970s, 99.4% of children drew a male scientist. That proportion dropped to 72% between 1985 and 2016. By the 2010s, about one in three drawings portrayed a female scientist.
Low back pain: a major global challenge
A Supercolony of Penguins Has Been Found Near Antarctica
Low Back Pain, Which Affects 540 Million Worldwide, Often Mistreated
216 SirT6 I thought this was a super intriguing paper. What the authors show is that there is a neuronal gene, Arc, that forms virus-like capsids. In the body, endogenous Arc protein forms capsules that contain mRNA, and these capsules are transferred to nearby neurons. This mRNA actually gets turned into protein in the receiving cells. Why this is happening is unclear. But this pathway appears to be conserved across a wide range of species. And the Arc protein itself appears to trace its evolutionary lineage back to an old retroviral protein. Things I wonder about: - We know that dysfunction in the production of Arc protein has been implicated in various neurological conditions including: amnesia, Alzheimer's disease, autism spectrum disorders, and Fragile X syndrome. Is this related to the RNA-transferring activity of the protein? - What sort of mRNA messages are being transported? How dynamic is this process? Is it important to the biology of the system? - What is the point of transferring mRNA this way? Presumably the receiving cells have the same genome and could make the mRNA themselves. And protein-based transduction signals are far better characterized methods for cell-cell signaling. Is there anything special about transferring information this way? - What about other organ systems? Are there similar examples of this type of cell-cell communication? The closest I could think of was the example of mutant EGFRvIII protein, which can form membrane-based blebs and transfer from one cancerous cell to nearby cells, and inform oncogenic signaling. But this mostly happens in the brain too (glioblastoma). The full research paper, [The Neuronal Gene Arc Encodes a Repurposed Retrotransposon Gag Protein that Mediates Intercellular RNA Transfer ]( was published in the journal *Cell*.
72 moreawkwardthenyou We are a soup of bacteria, viruses and pride
18 Slackerjacks2017 From the paper, a gene that has virus like properties and encodes a protein called Arc (activity-regulated cytoskeleton-associated protein) is involved in the transfer of vesicles which contain mRNA from one neuron to another. The mRNA contained in the vesicles could be modulating the transcription activity of neighboring neurons - which is similar to viral activity.
60 kildala "back-boned animals"... you mean vertebrates?
14 FdaPM Could this be used to improve the effectiveness of gene therapy?
10 Batgate This is super cool! Another example of how capable evolution is. Could this be the mechanism for biologically coded memory? I've only read a little bit of the article, but the concept of viruses that store memory data and transfer it by replicating is super interesting. The article states that Arc genes exist in plenty of different kinds of animals, and that without it, animals are incapable of forming memories. Very cool stuff.
20 kadenjtaylor DUDE! Geoffrey Hinton (computer scientist) has a talk in which he claims that human brains must be using backpropagation (way to update/modify internal weights) just like a neural network does, even though neuroscientists haven't found evidence that such a process is going on. Could it be that the brain is sending asynchronous update packets which are used by the receiving neurons to update their structure?
4 DisguisedPhoton Very interesting. I wonder if something like this comes completely unforseen and strange or if maybe it makes sense because, say, it could explain some mechanisms about memory foeming scientists had not yet fully understood. This is all really fascinating to me. Can someone explain what is (or what was until now) the current theory about how memories are formed and stored in our brains?
3 PM_ME_YOUR_CLIT_LADY Matrix was right. We are virus
3 lunarul Reminds me of the nanovirus in Adrian Tchaikovsky's Children of Time
4 Bat_city I’m currently prepping for my Microbiology final and this is fascinating!!
7 Bahatur That is very interesting. As an analogy, consider moving data between computers: we have an internet and can send it via satellite or fiber optic cable, but the fastest way to move huge quantities of data remains loading it on to high-density drives and shipping the drives. RNA and DNA are fantastically dense ways of packaging information. I bet if we took the information in one of these ARC capsules, and measured the 5mm or whatever it might move before attaching to another neuron, it would be an *extremely* fast method of transmission. Considering that neurons use electrochemical signaling normally, which is much slower than the electrical signals we use in computers, I would not be surprised if ARC capsules proved to be the majority of total information transmission in the brain.
2 Reflections-Observer Ha-Ha! We are walking fermenting bags of skin used by "ideas" viruses to spread memes around. And technology is just another step of evolution of these viruses :P
2 Mnementh2230 ...probably parkinsons and alzheimers, I'd wager. One wonders what the evolutionary pressure behind this trait would have been.