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
1 shiruken Welcome to /r/science! You may see more removed comments in this thread than you are used to seeing elsewhere on reddit. On /r/science we have [strict comment rules]( designed to keep the discussion on topic and about the posted study and related research. This means that comments that attempt to confirm/deny the research with personal anecdotes, jokes, memes, or other off-topic or low-effort comments are likely to be removed (Yes, we all get that you want to be male sea turtles now). Because it can be frustrating to type out a comment only to have it removed or to come to a thread looking for discussion and see lots of removed comments, please take time to review our comment rules before posting. If you're looking for a place to have a more relaxed discussion of science-related breakthroughs and news, check out our sister subreddit /r/EverythingScience.
26579 99trumpets I study sea turtles. First, a minor clarification to the title - sex ratio is highly female-skewed *at certain beaches.* It has always been the case that some beaches closer to the equator (warmer beaches) produce predominantly females, while other beaches farther from the equator, especially the “polar-most” beaches at the very fringe of the nesting range for certain species, produce mostly males. For instance in the US it has long been the case that southern Florida beaches produce mostly females while the North Carolina area produces most of the males (for loggerheads & greens). What’s happening now is a sudden skew in ratios at both types of beaches, the mostly-female beaches going to all-female and the mostly-male beaches going to approx 50:50. The question is, can sea turtles alter nest depth or shift “polarward” to establish new male-producing nest sites, i.e. colonizing new beaches that haven’t been used before. Some recent studies have found that females at the “hot” beaches are indeed digging deeper (cooler) nests, apparently in a response to sand temperature, but that this is only partially effective (i.e. even the deep nests produce mostly females. Those deeper nests do produce a couple more males, but not enough to ensure optimum fertility of all females). However, sea turtles are also shifting their range. For instance in the US, Assateague Island (Maryland) just had its first loggerhead nest, which produced 100 hatchlings, likely predominantly males. Kemp’s ridleys too are coming out of the Gulf of Mexico & starting to move up the eastern seaboard, and encouragingly Texas had a record number of Kemp’s nests last year (they usually nest in Mexico). But a considerable problem here is that turtles are moving into areas that have not historically had them and that therefore don’t have basic protections set up to help nesting turtles. Cape Cod has been overwhelmed by a huge influx of young Kemp’s ridleys that end up stranded on the northern shore, in enormous numbers recently. Re nest habitat generally though, sandy beaches are usually intensely developed for human recreation and baby sea turtles don’t fare well with the “coastal roads + strip of houses + strong street lights” setup that we humans tend to put along most beaches. This is one (of many) examples of species trying to shift their range in response to climate change, but in the process leaving the southern wildlife refuges & policies that had been set up to help them, and moving into more northern areas where no such protections yet exist. There is an interesting issue here of species moving faster than wildlife policy can keep up. (Same issue is occurring w N Atlantic right whales btw, which have just moved out of fisheries/shipping zones that were carefully arranged to not overlap w the whales, and into Canadian waters with no such regulations, the result being the worst die-off ever recorded, last summer. Ships smashing into them left & right, whales with horrific entanglements washing up dead. The Canadians have not had right whales up there before so it just took them all by surprise.) Anyway, sea turtle survival may eventually depend on residents of mid-latitude beaches that have not historically had turtles being willing to rapidly change beach lighting/traffic policy to encourage sea turtle nesting. These mid-latitude beaches are the ones that can produce the males in the future. For example, US coastal residents in Maryland, Virginia & Long Island can help by watching for turtle nests & reducing lighting when nests occur. Though... the pace of change may become so rapid that we may need to move eggs, physically, to northern beaches so that those individual hatchlings will imprint on northern beaches. This is known as “assisted migration” and it may become essential, especially when the beaches themselves start moving/flooding as sea level really begins to change. tl;dr - This is solvable if turtles can move to different nest sites, but we may need to help them move.
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414 [deleted] The sex of a lot a reptiles are determined by the temperature at which the eggs incubate. I used to raise and breed several species of old world chameleons and I could skew the sex ratios of the clutches by altering the temperature of the incubators. In only takes a couple of degrees change. This is shift in the sex ratios of the turtles is a very obvious indicator of temperature change in these regions.
194 0ldgrumpy1 Would global warming mean that new beaches become suitable for the turtles to use? Transfering eggs to cooler area beaches would give a reverse sex imbalance on those beaches.
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315 sammyb67 What is the normal ratio?
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