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How Targeted Advertising on Social Media Drives People to Extremes

Few minutes ago

People seeking to radicalize others are using ads to push conspiracy theories and extremist views -- Read more on ScientificAmerican.com

It's Time for a Global Ban on Destructive Antisatellite Testing

Few minutes ago

The orbital debris created in the explosions is dangerous, long-lasting and a threat to the growing space economy -- Read more on ScientificAmerican.com

What's Holding Up New Omicron Vaccines?

Few minutes ago

Vaccine makers worry yet another variant will start dominating in the months it takes to roll out shots against this one -- Read more on ScientificAmerican.com

Plants are Stuck as Seed-Eating Animals Decline

About an hour ago

Their ability to track climate change is being squeezed on all sides -- Read more on ScientificAmerican.com

Space travel destroys red blood cells faster than on Earth

3 hours ago

Canadian research on astronauts' red blood cells while in space could help knowledge of anaemia.

Past eight years: Warmest since modern recordkeeping began

13 hours ago

Earth's global average surface temperature in 2021 tied with 2018 as the sixth warmest on record, according to independent analyses done by NASA and NOAA. Collectively, the past eight years are the warmest years since modern recordkeeping began in 1880.

Doctors and patients are facing tough choices because of the national blood crisis

15 hours ago

The COVID-19 pandemic has contributed to a 62% drop in blood drives at schools and colleges, according to the American Red Cross.

Epstein-Barr Virus Found to Trigger Multiple Sclerosis

16 hours ago

The research could mark a turning point in the fight against MS -- Read more on ScientificAmerican.com

California Presents Plan to Prevent Extreme Heat Deaths

17 hours ago

The report follows a heat wave that killed hundreds across the western U.S. this summer -- Read more on ScientificAmerican.com

Scientists determine age of some of the oldest human bones

19 hours ago

Some of the oldest human remains ever unearthed are the Omo One bones found in Ethiopia. For decades, their precise age has been debated, but a new study argues they're around 233,000 years old.

The 'green' row over the UK's largest renewable power plant

19 hours ago

The UK's wood-burning Drax power plant hopes to expand but faces questions on its green credentials.

'As a black woman in STEM I'm used for photo opportunities'

19 hours ago

Chemist Cynthia Chapple talks about how to get more black girls from inner-cities into STEM careers.

Astronomers Have Found Another Possible 'Exomoon' beyond Our Solar System

20 hours ago

Kepler-1708 b-i appears to be a giant moon orbiting a Jupiter-sized planet thousands of light-years from Earth -- Read more on ScientificAmerican.com

Why omicron may cause less harm - and what it means for the future of the pandemic

1 days ago

There's growing evidence that omicron causes less severe disease than previous variants. Does that mean SARS-CoV-2 is evolving into a more mild virus? Will future surges be less deadly and disruptive?

NASA's Perseverance Rover Chokes on Mars Pebbles while Collecting a Rock Sample

1 days ago

The rover’s latest sample collection—an effort to gather material for eventual return to Earth—is off to a rocky start -- Read more on ScientificAmerican.com

Hungry Hyenas Can Help Human Health

1 days ago

Hyenas scavenging near cities might lessen human and livestock diseases -- Read more on ScientificAmerican.com

New Bait Uses Mosquitoes' Love of Malaria Parasite to Bite Them Back

1 days ago

Molecules produced by the parasite lure mosquitoes to a beet-based bait -- Read more on ScientificAmerican.com

Some COVID Patients Need Amputations to Survive

1 days ago

Impaired blood flow leads to loss of limbs -- Read more on ScientificAmerican.com

Water pollution: How clean are the UK's rivers and lakes?

1 days ago

England's rivers are contaminated by a "chemical cocktail" of pollution- what's being done to tackle the issue?

Cosmic 'spider' found to be source of powerful gamma-rays

1 days ago

Astronomers have discovered the first example of a binary system where a star in the process of becoming a white dwarf is orbiting a neutron star that has just finished turning into a rapidly spinning pulsar. The pair is a 'missing link' in the evolution of su…

Oceans Break Heat Record for Third Year in a Row

1 days ago

Last year broke the record from 2020 by about 14 zettajoules, or 20 times the world’s annual energy consumption -- Read more on ScientificAmerican.com

Fastest DNA sequencing technique helps undiagnosed patients find answers in mere hours

1 days ago

A research effort set the first Guinness World Record for the fastest DNA sequencing technique, which was used to sequence a human genome in just 5 hours and 2 minutes.

Regrowing knee cartilage with an electric kick

1 days ago

Bioengineers successfully regrew cartilage in a rabbit's knee, a promising hop toward healing joints in humans.

Durham University fibre-optics help largest 3D map of Universe

1 days ago

Their Dark Energy Spectroscopic Instrument has already broken all records for 3D galaxy surveys.

'Chemical cocktail' polluting English rivers - MPs warn

1 days ago

Tyres and wet wipes are soiling rivers but the biggest polluters are farms and water companies.

China is doubling down on its 'zero-tolerance' COVID policy ahead of the Olympics

1 days ago

China is battling coronavirus outbreaks in six cities. More than 20 million people are in some form of lockdown.

Scientists think they've found a big, weird moon in a far-off star system

1 days ago

Scientists have found many planets orbiting distant stars, but so far no proof that any have moons. Now, researchers have detected signs of a large exomoon orbiting a Jupiter-like world.

'Slushy' magma ocean led to formation of the Moon's crust

1 days ago

Scientists have shown how the freezing of a 'slushy' ocean of magma may be responsible for the composition of the Moon's crust.

Oxygen ions in Jupiter's innermost radiation belts

1 days ago

Researchers find high-energy oxygen and sulfur ions in Jupiter's inner radiation belts -- and a previously unknown ion source.

Coronavirus FAQ: Why are some folks hacking home COVID tests by swabbing their throat?

1 days ago

The FDA-authorized tests call for a nasal swab. Some doctors are tweeting that they're doing a throat swab too - though they don't recommend this step to the public. Here's a look at the swab debate.

Medicare proposes covering expensive Alzheimer's drug for those in clinical trials

2 days ago

Aduhelm is the first treatment approved in the country to slow cognitive decline in those living with Alzheimer's. Doctors have refused to prescribe it, given the lack of data and evidence behind it.

Study challenges evolutionary theory that DNA mutations are random

2 days ago

Researchers have found that DNA mutations are not random. This changes our understanding of evolution and could one day help researchers breed better crops or even help humans fight cancer.

New Sensor Tells You How Well Your Mask Is Working

2 days ago

FaceBit tracks a face covering’s fit and wear time, as well as its wearer’s vital signs -- Read more on ScientificAmerican.com

Remembering faces and names can be improved during sleep

2 days ago

New research has documented the effect reactivating memory during sleep has on face-name learning. The researchers found that people's name recall improved significantly when memories of newly learned face-name associations were reactivated while they were nap…

New Year's Resolutions Are Notoriously Slippery, but Science Can Help You Keep Them

2 days ago

You can change your behavior in lasting ways by changing how you frame your situation, explains behavioral scientist Ayelet Fishbach in her new book -- Read more on ScientificAmerican.com

Newly discovered type of 'strange metal' could lead to deep insights

2 days ago

A new discovery could help scientists to understand 'strange metals,' a class of materials that are related to high-temperature superconductors and share fundamental quantum attributes with black holes.

China's Tianjin orders more testing on 14 million after omicron reaches city

2 days ago

The city of Tianjin ordered a second round of COVID-19 testing on Wednesday in the city about an hour from Beijing, which is set to host the Winter Olympics from February 4th.

Rainy days harm the economy

2 days ago

Economic growth goes down when the number of wet days and days with extreme rainfall go up, a team of scientists finds. The data analysis of more than 1,500 regions over the past 40 years shows a clear connection and suggests that intensified daily rainfall dr…

Earliest human remains in eastern Africa dated to more than 230,000 years ago

2 days ago

The age of the oldest fossils in eastern Africa widely recognized as representing our species, Homo sapiens, has long been uncertain. Now, dating of a massive volcanic eruption in Ethiopia reveals they are much older than previously thought.

Rubber material holds key to long-lasting, safer EV batteries

2 days ago

For electric vehicles (EVs) to become mainstream, they need cost-effective, safer, longer-lasting batteries that won't explode during use or harm the environment. Researchers may have found a promising alternative to conventional lithium-ion batteries made fro…

Ancient Mesopotamian discovery transforms knowledge of early farming

2 days ago

Researchers have unearthed the earliest definitive evidence of broomcorn millet (Panicum miliaceum) in ancient Iraq, challenging our understanding of humanity's earliest agricultural practices.

Twelve for dinner: The Milky Way's feeding habits shine a light on dark matter

2 days ago

Astronomers are one step closer to revealing the properties of dark matter enveloping our Milky Way galaxy, thanks to a new map of twelve streams of stars orbiting within our galactic halo.

Rugby ball-shaped exoplanet discovered

2 days ago

With the help of the CHEOPS space telescope, an international team was able to detect the deformation of an exoplanet for the first time. Due to strong tidal forces, the appearance of the planet WASP-103b resembles a rugby ball rather than a sphere.

1,000-light-year wide bubble surrounding Earth is source of all nearby, young stars

2 days ago

The Earth sits in a 1,000-light-year-wide void surrounded by thousands of young stars -- but how did those stars form? For the first time, astronomers have retraced the history of our galactic neighborhood, showing exactly how the young stars nearest to our so…

Surgeons Transplant Pig's Heart into Dying Human Patient in a First

2 days ago

It was a last-ditch effort to save a Maryland man’s life -- Read more on ScientificAmerican.com

Why we feel confident about decisions we make

2 days ago

A team of researchers has shown for the first time that decisions feel right to us if we have compared the options as attentively as possible -- and if we are conscious of having done so. This requires a capacity for introspection.

Djokovic admits a mistake on his Australia travel form and outlines COVID test timing

2 days ago

Djokovic moved to clarify the timeline about the period when he was infectious last month and about errors on the travel document he used to enter Australia to defend his Australian Open tennis title.

In Orlando, a mountain of coal ash evades EPA rules. It's not the only one.

2 days ago

Environmentalists want Biden's Environmental Protection Agency to aggressively regulate huge piles of toxic coal ash across the nation. The waste has polluted groundwater in 39 states.

Black hole at center of Milky Way unpredictable and chaotic

2 days ago

Researchers have found that the black hole at the center of our galaxy, Sagittarius A*, not only flares irregularly from day to day but also in the long term.

Fires Doubled Australia's Carbon Emissions--Ecosystems May Never Soak It Back Up

2 days ago

Increasing odds of hot, dry weather make it less likely trees and other plants will quickly grow back -- Read more on ScientificAmerican.com

Richard Leakey's Legacy in Science, Conservation and Politics

2 days ago

The famed paleoanthropologist explored humankind’s origins and worked to safeguard a future for humans and wildlife alike in Kenya and beyond -- Read more on ScientificAmerican.com

Successful transplant of porcine heart into adult human with end-stage heart disease

3 days ago

In a first-of-its-kind surgery, a 57-year-old patient with terminal heart disease received a successful transplant of a genetically-modified pig heart and is still doing well three days later.

Israeli scientists have trained goldfish to drive, in a scene out of a Dr. Seuss book

3 days ago

An experiment involving a robotic tank on wheels and six trained goldfish may offer insights into animals' ability to navigate unfamiliar environments.

Who gets to use NASA's James Webb Space Telescope? Astronomers work to fight bias

3 days ago

With the James Webb Space Telescope safely deployed, many scientists want to use it. To minimize the effect of unconscious biases, they go through a process developed for the Hubble Space Telescope.

Man gets genetically-modified pig heart in world-first transplant

3 days ago

David Bennett, 57, is doing well three days after the experimental surgery, doctors say.

Within a dinosaur's head: Ankylosaur was sluggish and deaf

3 days ago

Scientists took a closer look at the braincase of a dinosaur from Austria. The group examined the fossil with a micro-CT and found surprising new details: it was sluggish and deaf.

New Math Research Group Reflects a Schism in the Field

3 days ago

Critics accuse the organization of opposing efforts to stamp out inequity -- Read more on ScientificAmerican.com

Cyber risks add to climate threat, World Economic Forum warns

3 days ago

Survey of 1,000 experts and leaders finds cybersecurity and space add to the existing challenges of climate change and the coronavirus pandemic.

Researchers switch off gene to switch on ultraviolet in butterfly wings

3 days ago

Researchers have identified a gene that determines whether ultraviolet iridescence shows up in the wings of butterflies. The team showed that removing the gene in butterflies whose wings lack UV coloration leads to bright patches of UV iridescence in their win…

Physicists detect a hybrid particle held together by uniquely intense 'glue'

3 days ago

Physicists detected a hybrid particle that is a mashup of an electron and a phonon, 'glued' together with an exceptionally strong bond. It may be possible to tune the two components in tandem, enabling scientists to apply voltage or light to a material to tune…

As carbon removal gains traction, economists imagine a new market to save the planet

3 days ago

Carbon removal went mainstream in 2021. But the technology is still light years away from making a real difference combating climate change. A group of economists wants to help change that.

The Surprising Physics of Finger Snapping

3 days ago

You might not think that you can generate more body acceleration than a big-league baseball pitcher, but new research shows you can. -- Read more on ScientificAmerican.com

Identification of one of the first multicellular algae thanks to its chlorophyll fossilized for 1 bi…

3 days ago

Researchers have discovered the first in-situ evidence of chlorophyll remnants in a billion-year-old multicellular algal microfossil preserved in shales from the Congo Basin. This discovery has made it possible to unambiguously identify one of the first photot…

Nurses Struggle through a New COVID Wave with Rage and Compassion

3 days ago

A critical care nurse confronts the Omicron surge filling her hospital -- Read more on ScientificAmerican.com

Antarctica: Invasive species 'hitchhiking' on ships

3 days ago

Ships travelling to Antarctica could bring invasive species to the ocean's last pristine ecosystem.

Landmark Webb Observatory Is Now Officially a Telescope

3 days ago

The observatory has flawlessly unfurled its mirrors and sunshield—although more steps are needed before the science can begin -- Read more on ScientificAmerican.com

Fossils Reveal When Animals Started Making Noise

3 days ago

For billions of years Earth was quiet. Then life got loud -- Read more on ScientificAmerican.com

How to get insurance to pay for at-home COVID tests, according to the White House

3 days ago

The Biden administration says Americans should be able to order COVID-19 tests online later this month. Those who are eligible can get eight free over-the-counter at-home tests a month.

Climate change destroying homes across the Arctic

3 days ago

New research shows the huge threat posed by permafrost thaw to millions living in the Arctic.

Rebuilt New Orleans Levees Saved Lives and Property

3 days ago

The storm caused $65 million in damage across the U.S., according to the global reinsurance company Munich Re -- Read more on ScientificAmerican.com

The 'surprisingly simple' arithmetic of smell

3 days ago

Researchers studying locusts have found that the presence of smell can be determined by simply adding and subtracting the presence of certain neurons.

Breakthrough into the cause of male infertility

4 days ago

Scientists have identified a new genetic mechanism that can cause severe forms of male infertility. This breakthrough in understanding the underlying cause of male infertility offers hope of better treatment options for patients in the future.

Chemists use DNA to build the world's tiniest antenna

4 days ago

An easy-to-use device promises to help scientists better understand natural and human-designed nanotechnologies -- and identify new drugs.

Astronomers identify potential clue to reinonization of universe

4 days ago

Astronomers have identified a potential clue to how the universe became reionized after the Big Bang. The researchers identified a black hole, a million times as bright as our sun, that may have been similar to the sources that powered the universe's reionizat…

Ichthyosaur: Huge fossilised 'sea dragon' found in Rutland reservoir

4 days ago

The creature lived more than 90 million years ago and its remains were found poking out of the mud.

Veg diet plus re-wilding gives 'double climate dividend'

4 days ago

Switching to a plant-rich diet and using land freed up for nature is 'double whammy', experts say.

ArXiv.org Reaches a Milestone and a Reckoning

4 days ago

Runaway success and underfunding have led to growing pains for the preprint server -- Read more on ScientificAmerican.com

Energy bills: Fix insulation to tackle cost of heating, PM told

4 days ago

An industry group is calling for more funding for home improvements to help bring down the cost of heating homes.

Past seven years hottest on record - EU satellite data

4 days ago

Analysis shows 2021 was the fifth-warmest with record-breaking temperatures in some regions.

Simon Reeve: 'I feel a hypocrite over my carbon footprint'

5 days ago

The TV adventurer says he hopes the honest stories in his shows mitigate their environmental impact.

Tories call on Treasury to fund green energy plans

6 days ago

The Conservative Environment Network says removing charges from consumer bills would help cut costs.

As Biden Sets Ambitious Climate Agenda, U.S. Emissions Rise

6 days ago

Greenhouse gas emissions rose 7 percent in 2021, as high natural gas prices buoyed coal use -- Read more on ScientificAmerican.com

Fully 3D-printed, flexible OLED display

6 days ago

Researchers used a customized printer to fully 3D print a flexible organic light-emitting diode (OLED) display. The discovery could result in low-cost OLED displays in the future that could be widely produced using 3D printers by anyone at home, instead of by …

Novel brainstem circuit gives rise to the rhythms of vocalization

6 days ago

The vocal sounds of humans -- laughing, crying, and the babbling of babies -- have the same rhythmic quality as the sounds made by many mammals, songbirds, and even some species of fish. Researchers have discovered that a small cluster of neurons in the brain …

Sending life to the stars

7 days ago

No longer solely in the realm of science fiction, the possibility of interstellar travel has appeared, tantalizingly, on the horizon. Although we may not see it in our lifetimes -- at least not some real version of the fictional warp-speeding, hyperdriving, sp…

Tipping point in Humboldt Current off Peru leads to species shift

7 days ago

Fundamental changes in the ocean, such as warming, acidification or oxygen depletion, may have significant consequences for the composition of fish stocks, including the displacement of individual species. Researchers have reconstructed environmental condition…

Eccentric exoplanet discovered

7 days ago

An international research team has discovered a sub-Neptune exoplanet orbiting a red dwarf star.

How the brain's blue spot helps us focus our attention

7 days ago

How can we shift from a state of inattentiveness to one of highest attention? The locus coeruleus, literally the 'blue spot,' is a tiny cluster of cells at the base of the brain. As the main source of the neurotransmitter noradrenaline, it helps us control our…

Microbes produce oxygen in the dark

7 days ago

It is common knowledge that there would be no oxygen on Earth were it not for sunlight; the key component in photosynthesis. Now researchers have made the surprising discovery that oxygen is also produced without sunlight, possibly deep below the ocean surface…

Magnetic surprise revealed in 'magic-angle' graphene

7 days ago

Magnets and superconductors don't normally get along, but a new study shows that 'magic-angle' graphene is capable of producing both superconductivity and ferromagnetism, which could be useful in quantum computing.

Exercise alters brain chemistry to protect aging synapses

7 days ago

When elderly people stay active, their brains have more of a class of proteins that enhances the connections between neurons to maintain healthy cognition, a new study has found.

Astronomers capture red supergiant's death throes

7 days ago

Astronomers previously believed that red supergiant stars fell dormant at the end of their lives. A new study shows that red supergiant stars can violently erupt before collapsing into supernovae

Sorting cancers by 'immune archetypes' represents potential new approach to developing precision imm…

8 days ago

Using data from over 300 patient tumors, researchers have described 12 classes of 'immune archetypes' to classify cancer tumors. Their findings reveal that cancers from different parts of the body are immunologically similar to one another. These classificatio…

Nearly 2 million children worldwide develop asthma as a result of breathing in traffic- related poll…

8 days ago

Nearly 2 million new cases of pediatric asthma every year may be caused by a traffic-related air pollutant, a problem particularly important in big cities around the world, according to a new study.

Fingerprint patterns are linked to limb development genes

8 days ago

In the most comprehensive analysis to date, researchers found that the shapes of fingerprints -- whether they are circular, wavy, or winding -- are influenced by the genes responsible for limb development instead of skin patterning. The study could help scient…

How brain networks enable human conversation

8 days ago

A new study has identified a brain circuit that is active while we plan our spoken replies during conversation. The work promises to guide the design of new therapies for the 7.5 million Americans who have trouble using their voices, say the study authors. …

'Simple' bacteria found to organize in elaborate patterns

8 days ago

Researchers have discovered that biofilms, bacterial communities found throughout the living world, are far more advanced than previously believed. Scientists found that biofilm cells are organized in elaborate patterns, a feature that previously only had been…

Zoo air contains enough DNA to identify the animals inside

8 days ago

The air in a zoo is full of smells, from the fish used for feed to the manure from the grazing herbivores, but now we know it is also full of DNA from the animals living there. Two research groups have each published an independent proof-of-concept study showi…

Modern humans developed a more effective protection against oxidative stress

8 days ago

Very few proteins in the body have a change that makes them unique compared to the corresponding proteins in Neanderthals and apes. Researchers have now studied one such protein, glutathione reductase, which protects against oxidative stress. They show that th…

Physicists watch as ultracold atoms form a crystal of quantum tornadoes

8 days ago

Physicists have directly observed ultracold atoms forming 'quantum tornadoes' in a spinning fluid of ultracold atoms. The observations record a key crossover from classical to quantum behavior.

Air pollution from wildfires, rising heat affected 68% of US West in one day

8 days ago

Large wildfires and severe heat events are happening more often at the same time, worsening air pollution across the western United States, a study has found. In 2020, more than 68% of the western U.S. -- representing about 43 million people -- were affected i…

Farmers could be paid for post-Brexit 'rewilding' land changes

8 days ago

"Radical plans" could see large areas of land in England turned into nature reserves.

New research questions 'whiff of oxygen' in Earth's early history

8 days ago

A reexamination of Earth's famous 'whiff of oxygen' has the potential to rewrite early accounts of the planet's history by finding that atmospheric oxygen actually did not exist prior to the Great Oxygenation Event (GOE).

A novel compound might defeat multidrug-resistant bacteria common in hospitals

9 days ago

Increasingly, hospitalized patients contract infections that evade current antibiotics including colistin, long used as a last treatment option. The discovery of a new colistin variant might make it possible to outmaneuver these pathogens.

Antibiotic-resistant superbug evolved on hedgehogs

9 days ago

A type of MRSA evolved naturally on the skin of wild hedgehogs some 200 years ago, scientists say.

How oral bacteria suppress protection against viral growth

9 days ago

Researchers have discovered details of how proteins produced by oral epithelial cells protect humans against viruses entering the body through the mouth. They also found that oral bacteria can suppress the activity of these cells, increasing vulnerability to i…

Ancient Maya lessons on surviving drought

9 days ago

A new study casts doubt on drought as the driver of ancient Mayan civilization collapse.

Matter and antimatter seem to respond equally to gravity

9 days ago

As part of an experiment to measure -- to an extremely precise degree -- the charge-to-mass ratios of protons and antiprotons, researchers have found that, within the uncertainty of the experiment, matter and antimatter respond to gravity in the same way. …

Superbug MRSA arose in hedgehogs long before clinical use of antibiotics

9 days ago

Scientists have found evidence that a type of the antibiotic resistant superbug MRSA arose in nature long before the use of antibiotics in humans and livestock, which has traditionally been blamed for its emergence. Hedgehogs carry a fungus and a bacteria on t…

Earth isn't 'super' because the sun had rings before planets

9 days ago

Before the solar system had planets, the sun had rings -- bands of dust and gas similar to Saturn's rings -- that likely played a role in Earth's formation, according to a new study.

New research shows gene exchange between viruses and hosts drives evolution

9 days ago

The first comprehensive analysis of viral horizontal gene transfer (HGT) illustrates the extent to which viruses pick up genes from their hosts to hone their infection process, while at the same time hosts also co-opt useful viral genes.

The first topological acoustic transistor

9 days ago

Researchers have designed and simulated the first topological acoustic transistors -- with sound waves instead of electrons -- and proposed a connection architecture to form a universal logic gate that can switch the flow of sound on and off.

School closures led to more sleep and better quality of life for adolescents

9 days ago

The school closures in spring 2020 had a negative effect on the health and well-being of many young people. But homeschooling also had a positive flipside: Thanks to sleeping longer in the morning, many teenagers reported improved health and health-related qua…

Study reveals more hostile conditions on Earth as life evolved

9 days ago

During long portions of the past 2.4 billion years, the Earth may have been more 'inhospitable' to life than scientists previously thought, according to new computer simulations. Using a state-of-the-art climate model, researchers now believe the level of ultr…

Anthropologists study the energetics of uniquely human subsistence strategies

10 days ago

Among our closest living relatives -- the great apes -- we humans are unique: We have larger brains, reproduce more quickly and have longer life spans. These traits are obviously valuable, but the extra energy required to sustain them is quite significant. So …

New route for regulating blood sugar levels independent of insulin

10 days ago

Insulin, produced in the pancreas, has been considered the primary means of treating conditions characterized by high blood sugar (glucose), such as diabetes. Scientists have now discovered a second molecule, produced in fat tissue, that, like insulin, also po…

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