Human Quirks: Health & Medicine

October 18, 2026

Top Headlines

Scientists Tested 39 Sweeteners and Uncovered Surprising Gut Effects

Oct. 17, 2026 Scientists have discovered that many common sweeteners can interfere with gut bacteria, with some combinations involving medications producing surprisingly strong effects. One sweetener mixed with a widely prescribed antidepressant reduced ...

The Secret to Easier Exercise as an Adult May Start in Childhood

Oct. 14, 2026 Exercise during childhood could have a surprising lifelong benefit, potentially making physical activity less exhausting in adulthood. In a study involving guinea fowl, researchers discovered that birds accustomed to carrying weights while growing ...

Oct. 12, 2026 Popular GLP-1 weight loss drugs, such as Ozempic and Wegovy, have been linked to unexpectedly high rates of nail detachment, hair loss, and scalp inflammation, with some problems occurring several times more frequently among users. Researchers found ...

The Hidden Math of Alzheimer's Could Point to New Treatments

Oct. 11, 2026 Mathematics may hold unexpected clues to understanding Alzheimer’s disease. Scientists have developed a model showing how common metals like copper and zinc may influence the buildup of proteins associated with the disease, while also exploring ...

Eating Olive Oil Before Carbs Has a Surprising Effect on Blood Sugar

Oct. 11, 2026 A simple change in the order you eat your food could help prevent blood sugar spikes. Scientists discovered that giving mice olive oil before carbohydrates slowed digestion and activated a surprising combination of hormones and nerve signals that ...

Scientists Warn a Popular Vitamin D Supplement May Have a Hidden Downside

Oct. 8, 2026 Not all vitamin D supplements are created equal, and new research suggests that one popular form may have an unexpected downside. Scientists found that taking vitamin D2 can actually lower the body's levels of vitamin D3, the form naturally produced ...

Scientists Reveal What Seven Days of Fasting Does to the Human Body

Oct. 5, 2026 Scientists found that prolonged fasting triggers major changes throughout the body, but many of the most interesting effects only appeared after about three days without food. The results suggest fasting may influence health in ways that go beyond ...

Scientists Just Discovered What Coffee Really Does to Your Gut and Brain

Sep. 28, 2026 A new study suggests coffee may influence mood and brain function by changing the activity of microbes in the gut. Both caffeinated and decaf coffee were linked to lower stress, depression, and impulsivity, while also producing measurable changes in ...

Blood Tests Reveal Why Astronauts Get Constipated in Space

Sep. 28, 2026 Spaceflight may dramatically change the gut within weeks, causing bacteria to break down more protein as food moves more slowly through the intestines. The shift could help explain astronaut constipation and may have wider effects on health, making ...

Pomegranate Compound Improves Heart Function by Up to 80% in Study

Sep. 28, 2026 A compound the body can make after eating pomegranates, walnuts, and some berries improved measures of heart function by up to 80% in animal models of a difficult-to-treat form of heart failure. Urolithin A helped stiff heart tissue relax and ...

160-million-year-old Proteins Show Surprising Power Against Superbugs

Sep. 28, 2026 Scientists resurrected antimicrobial peptides from mammals that lived millions of years ago and found that some were more potent against drug-resistant bacteria than modern human versions. These evolutionary relics could provide new clues for ...

Scientists Say House Cats Could Help Unlock Better Cancer Treatments for Humans

Sep. 26, 2026 Scientists have mapped the genetics of cat cancer on an unprecedented scale and found surprising similarities with tumors in humans. The findings could help bring precision cancer treatments to cats ...

Latest Headlines

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Stanford Scientists Discover the Human Brain May Actually Be Two Separate Organs

Sep. 21, 2026 Scientists have found that the human brain develops from two distinct cellular systems, suggesting that evolution fused together two ancient nervous ...

Ancient DNA Reveals How Plague Kept Returning for 400 Years After the Black Death

Sep. 20, 2026 Ancient DNA reveals that plague repeatedly returned to Europe for more than 400 years after the Black Death, evolving into new lineages and spreading ...

Hidden “immune Organ” in the Skull May Help Fight Brain Cancer

Sep. 16, 2026 Scientists discovered a hidden “immune organ” inside the skull that acts as a rapid first responder against brain cancer in mice. Strengthening this local immune defense improved tumor rejection ...

Smelling Chocolate Helped Men Complete More Reps Without Feeling More Tired

Sep. 15, 2026 Simply smelling chocolate helped men complete more leg extension repetitions without making the workout feel harder, with dark chocolate producing the strongest effect. The researchers think familiar ...

The U.S. Eradicated This Flesh-Eating Parasite. Now It’s Back

Sep. 15, 2026 The flesh eating New World screwworm has returned to the United States, threatening livestock, wildlife, pets and potentially people as it spreads north. A new UC San Diego tracking system aims to ...

Cancer Is Rising in Younger Adults. Faster Biological Aging May Help Explain Why

Sep. 14, 2026 Cancer rates are rising in adults under 55, and new research suggests accelerated biological aging may be one piece of the puzzle. Scientists found ...

A Hidden Compound in Healthy Foods May Worsen IBD

Sep. 12, 2026 A natural compound found in foods such as spinach, almonds, and sweet potatoes may aggravate gut inflammation in people with Crohn’s disease and ulcerative colitis because their intestines appear ...

The Secret to Longer Life May Be Hidden in Bat DNA

Sep. 11, 2026 Long-lived bats appear to combine powerful immune defenses with unusual strategies for eliminating damaged cells, potentially helping them avoid cancer and disease for decades. Researchers hope these ...

Scientists Find Signs of Extreme Aging and Youth in the Same 117-Year-Old

Sep. 11, 2026 A remarkably detailed study of Maria Branyas, who lived past 117, reveals that extreme longevity may involve both intense aging and powerful biological protection at the same time. Researchers found ...

Caffeine May Flip an Ancient Cellular Switch Linked to Slower Aging

Sep. 8, 2026 Scientists found that caffeine activates an ancient cellular energy system involved in stress resistance, DNA repair, and growth. The discovery could help explain caffeine’s links to healthier ...

Depression May Shut Down the Brain’s Ability to Make New Neurons

Aug. 25, 2026 A major study found that adults with depression show disrupted production of new neurons in the hippocampus, potentially weakening the brain’s ability to separate new experiences from painful ...

What You Eat Before Age 2 May Affect Your Health 70 Years Later

Aug. 26, 2026 Britain’s postwar sugar rationing created a rare natural experiment that let researchers examine how early sugar exposure might affect health decades later. People who experienced more rationing ...

The Adult Brain Can Repair Itself Better Than Scientists Thought

Aug. 12, 2026 The adult brain may be far better at repairing itself than scientists once believed. In mice, researchers discovered a special group of support cells called astrocytes that respond to damaged brain ...

COVID-19 Awakens Dormant Viruses — and One Is Linked to Long COVID

Aug. 15, 2026 COVID-19 can reactivate dormant viruses hiding in the body, including Epstein-Barr, cytomegalovirus, and several herpes viruses. One poorly understood viral family was strongly associated with long ...

Cialis Linked to Higher Glaucoma Risk in Large Study

Sep. 7, 2026 A large study of nearly 74,000 men suggests that long-term use of tadalafil, best known as Cialis, may be linked to a higher risk of glaucoma and other eye pressure problems. Men prescribed the drug ...

Sitting Up Straight May Improve Your Mood and Decision-Making

Aug. 5, 2026 A simple change in posture may subtly affect how people feel and make decisions. Participants who sat upright reported greater feelings of pride and took more successful risks in a virtual balloon ...

Tooth Count May Predict Survival After Pancreatic Cancer Surgery

Aug. 21, 2026 Pancreatic cancer patients with at least 21 natural teeth survived nearly two years longer after surgery than those with fewer teeth in a study of 339 people. Researchers suspect tooth loss may ...

Two Deadly Flowers Could Inspire Powerful New Medicines

Aug. 3, 2026 Scientists have figured out how two famously poisonous plants create chemicals with surprising medical potential. After tracking thousands of genes in wolfsbane and larkspur, they identified six ...

Scientists Discover a Powerful New Antivenom Hidden in Rattlesnake Blood

Sep. 8, 2026 Researchers discovered that combinations of toxin-blocking proteins naturally found in rattlesnake blood can powerfully neutralize venom from several dangerous snake species. In lab tests, the ...

When Gut Microbes Run Low on Fiber, They May Start Eating You

Aug. 15, 2026 Gut microbes need something to eat, and when fiber is limited, they may begin consuming proteins from the mucus lining that protects the gut. Researchers found that fiber can suppress this process, ...

Scientists Find a Simple Way to Stop Cavities Without Drilling

July 29, 2026 A liquid brushed onto cavities in seconds may spare many young children from pain, infection, and surgery. A major U.S. trial found that silver diamine fluoride stopped decay in more than half of ...

Watching Too Much TV in Midlife May Shrink the Brain

July 21, 2026 Watching television very often in midlife may be linked to troubling brain changes decades later. In a study of about 1,700 adults, frequent TV viewers later showed smaller brain regions involved in ...

Scientists Tested 39 Sweeteners and Found Unexpected Gut Effects

July 17, 2026 A large laboratory study found that many commonly used sweeteners can directly change the growth of gut bacteria. Researchers identified more than 100 cases in which sweeteners behaved differently ...

Scientists Discover a Hidden Heart Valve Risk Linked to Gum Disease

July 13, 2026 Researchers found that bacteria linked to gum disease may help drive the development of calcific aortic valve stenosis by triggering inflammation and calcium buildup in the heart valve. The early ...

Ozempic May Have Revealed the Brain’s Hidden “craving Center”

Aug. 12, 2026 Ozempic-like drugs appear to weaken more than hunger—they may also reduce cravings for alcohol and other addictive substances. Scientists are increasingly tracing this effect to the lateral septum, ...

Scientists Want to Quarantine Alien Life on the Moon Before It Reaches Earth

July 6, 2026 Scientists are calling for a lunar quarantine facility where samples from Mars, the Moon, and beyond would be examined before being brought to Earth. They warn that even a tiny alien microorganism ...

Harvard Scientists Turn a Silicon Chip Into a DNA Writing Machine

July 8, 2026 Scientists have created a silicon chip that can write dozens of DNA sequences simultaneously using electricity and water-based enzymes, offering a cleaner alternative to conventional DNA ...

Scientists Discover Neurons Must Break Their DNA to Build the Brain

June 21, 2026 As newborn neurons make their way through the developing brain, they must squeeze through incredibly tight spaces to reach their final destinations. Researchers discovered that this physical journey ...

Ancient DNA Reveals Plague Was Already Killing Humans 5,500 Years Ago

June 18, 2026 Plague was already a deadly killer 5,500 years ago, long before cities, farming, or the rat-infested conditions usually linked to historic outbreaks. By analyzing ancient DNA from hunter-gatherer ...

Ozempic and Wegovy Linked to Surprising Drop in Violent Behavior

June 17, 2026 A Rutgers study suggests GLP-1 drugs such as Ozempic and Wegovy may weaken the link between impulsive tendencies and violent behavior. The surprising finding hints that these medications could affect ...