Health
Discover facts about health. Small discoveries that change the way you see familiar things.
Health
Hamstrings notably cross over two completely separate joints
Your hamstrings cross both the hip and the knee. Bend forward at the hip while straightening the knee and you pull the same muscles from both ends, which is…
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Your body contains a tiny source of antimatter
A small fraction of natural potassium is radioactive potassium-40. One of its very rare decay routes releases a positron, the electron's antimatter…
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Soy won't feminize men
Soy contains compounds that resemble estrogen enough to interact with some of the same receptors, but they do not act like human estrogen in the body. In…
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Cooling food on counters promotes rapid germs
A large pot cools slowly because heat trapped in its center has a long way to escape. While the food stays warm, bacteria can multiply, so dividing it into…
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Hemoglobin carries four oxygen molecules at once
Each hemoglobin molecule has four places where oxygen can bind. Packed inside red blood cells, these molecules let the cells pick up oxygen in the lungs and…
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Why dogs' mouths aren't cleaner than ours
A dog’s mouth has its own mix of microbes, just as a human mouth does. The two communities include different species, so a dog’s saliva isn’t a cleaner…
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How fiber helps lower your cholesterol
Soluble fiber can trap bile acids in the gut and carry them out in stool before they’re reabsorbed. The liver then uses cholesterol to make more bile acids,…
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Rigor mortis rigidly locks muscles due to energy depletion
Muscles do not stiffen because they are still actively flexing: the chemical energy molecule ATP has run out. Without it, the microscopic grips inside muscle…
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Why one moldy spot can ruin the whole loaf
Mold spreads by sending tiny threads into porous bread, often before a colored spot appears on the surface. Because those threads can reach beyond the visible…
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Broad ligament drapes over female reproductive organs
The uterus, ovaries, and fallopian tubes sit beneath a fold of tissue called the broad ligament. Its broad drape helps support the organs rather than acting…
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Your soft palate helps keep drinks out of your nose
As you swallow, the soft palate lifts at the back of your mouth, and the uvula moves with it to help seal the opening to your nose. That closes the upward…
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You have more than five senses
Your brain gets position updates from sensors in muscles and joints, so you can touch your nose with your eyes closed; that sense is proprioception. Pain and…
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Why lifted acrylic nails can turn green
When an acrylic nail lifts, water can slip into the gap and stay trapped against the natural nail. That damp pocket gives Pseudomonas bacteria a place to…
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Why travel can exhaust you without jet lag
Travel can wear you down without changing your time zone. Hours of cramped sitting, noise, waiting, and stress take a physical and mental toll; jet lag is…
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Why being near water calms your mind
The ocean keeps offering a repeating pattern—waves arriving, sounds rising and fading—so your attention can settle on one steady thing. With less mental…
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An old medical recipe mixed snails with earthworms
Historical remedies for consumption included preparations made from snails and earthworms. Such recipes show how ingredients from the garden entered formal…
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Why sweatbands can leave your neck soaked
The band’s terrycloth absorbs sweat until every bit of it is full. Then the next drop bypasses the supposed solution and takes the scenic route down your neck.
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Scurvy can reopen wounds that already healed
Vitamin C helps the body build collagen, the tough protein that holds skin and scar tissue together. With too little of it, the body cannot maintain that…
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What's really inside a plant-based burger
A plant-based patty may be built from protein isolates and binders rather than whole vegetables, with sodium added for flavor. That is how some products…
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Orexin strictly governs conscious wakefulness
Orexin-producing brain cells send signals that help keep wakefulness steady. If that support falters, the brain can have trouble sustaining alertness through…
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Your body may be older than your birth certificate
A birth certificate counts years; biological age tries to describe how well the body is functioning. Researchers estimate it using clues such as changes in…
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You and a tree share more cellular machinery than appearances suggest
Both rely on DNA to store inherited instructions and on proteins to carry out cellular work. Plants also have specialized structures, such as chloroplasts,…
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Your tongue changes shape without a skeleton inside it
Muscles within the tongue alter its shape, while other muscles connect it to surrounding structures and move it as a whole. The fold underneath also links it…
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City noise pollution significantly raises baseline stress
A sudden siren is hard to ignore; a steady stream of traffic noise can keep the same alerting system quietly engaged. The body stays a little more vigilant in…
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