ScienceDirect answers to clear questions, with useful examples and context.
438 articlesAmoxicillin-induced rash in mononucleosis is a benign, immune-mediated skin reaction that appears in roughly 30 to 100 percent of people who take the antibiotic while infected with Epstein-Barr virus (EBV), compared with about 3 to 10…
Let's find outAre geniuses crazy? No — genius and mental illness are not the same thing, but they overlap more than most people expect.
Let's find outYes, eggs are generally good for a fatty liver when eaten whole and in moderation. Two large eggs a day supply roughly 300 mg of choline, 13 g of protein, and 10 g of fat, nutrients that support hepatic fat export rather than fat storage.
Let's find outAre hemorrhoids bad? No—hemorrhoids are normal anatomical structures, not a disease.
Let's find outAre cysts genetic? Sometimes, yes. A cyst is genetic when it arises from an inherited mutation that alters how cells grow, secrete fluid, or form the lining of an organ.
Let's find outYes, dodo birds were real. The dodo (*Raphus cucullatus*) was a flightless pigeon relative that lived only on Mauritius, an island in the Indian Ocean, and went extinct around 1662.
Let's find outYes, jasmine flowers are edible, but only certain species and only in controlled amounts.
Let's find outApple leaf diseases are fungal and bacterial infections that disfigure foliage, reduce photosynthesis, and cut yield, and the four that matter most in commercial orchards are apple scab, Marssonina blotch, cedar apple rust, and powdery…
Let's find outAre blood clots common after knee replacement? Without prevention, deep vein thrombosis (DVT) forms in roughly 40 to 60 percent of patients after major knee surgery, but with modern blood thinners and early movement that figure drops to…
Let's find outNo, not all big ants are carpenter ants. Size alone cannot identify a carpenter ant, and in most of North America the largest ants people encounter are field ants, Formica species, or thatching ants that never touch wood.
Let's find outAre dicots poisonous? No — dicots as a group are not poisonous, and the category itself says nothing about toxicity. "Dicot" is a structural classification describing two seed leaves and a branching vein pattern, not a chemical one.
Let's find outNo, lip blisters are not always herpes. Herpes simplex virus type 1 (HSV-1) is the single most common cause of recurrent blisters on the lip border, but it is not the only one.
Let's find outAre Bougainvillea perennials? Yes. Bougainvillea is a true perennial woody vine, meaning a single plant lives and reblooms for many years rather than dying after one growing season.
Let's find outCochlear implants are not the standard treatment for conductive hearing loss, and they are rarely used for it. Conductive hearing loss blocks sound before it reaches the inner ear, so the cochlea and hearing nerve are usually still healthy.
Let's find outYes, ADHD and autism are comorbid, and frequently so. Large population studies and meta-analyses put the co-occurrence rate at roughly 20 to 50 percent depending on which direction you count from: about 30 to 40 percent of autistic…
Let's find outAre chicken wings healthy? It depends almost entirely on how they are cooked. A plain roasted wing delivers about 90 calories, 8 grams of protein, and a favorable ratio of unsaturated to saturated fat, making it a genuinely nutritious food.
Let's find outYes, dried mushrooms are healthy for most people, and in some respects they are more concentrated sources of nutrients than fresh ones.
Let's find outYes, fiber supplements are genuinely good for you, but only when used correctly and for the right reasons.
Let's find outAre manatees dangerous to humans? No. There is no documented record of a wild manatee killing a person, and serious injuries are vanishingly rare.
Let's find outApple cider vinegar can temporarily relieve some sore throat discomfort, but it cannot cure the infection or inflammation causing it.
Let's find outYes, hair and nails are made of the same basic material: keratin, a family of tough structural proteins. Both are built by specialized cells that fill themselves with keratin and then die, leaving behind compacted protein.
Let's find outYou are not a sex addict merely because you have frequent sex, unconventional fantasies, or a high libido.
Let's find outYes, blackberries support weight loss, but not because they burn fat or "detox" the body.
Let's find outBunion correctors are only marginally effective: they relieve pressure and friction symptoms but do not reverse hallux valgus or reliably reduce the deformity angle.
Let's find outYes, cactus flowers are edible, and so are the buds and the fruit that follows them.
Let's find outAre Cooper's Hawks endangered? No. Cooper's Hawks are classified as Least Concern by the IUCN, and their population is actually increasing across most of North America.
Let's find outYes, Boston Terriers are brachycephalic. The breed carries the flat-faced skull shape that defines brachycephalic dogs, with a cephalic index (skull width divided by skull length, times 100) that typically lands in the mid-60s to low 70s.
Let's find outAnimal agriculture contributes roughly 14.5 to 20 percent of global greenhouse gas emissions, depending on how land-use change and supply-chain boundaries are counted.
Let's find outYes, bagged vacuums are generally better for allergies, but the advantage is narrower than marketing suggests.
Let's find outYes, donkeys are generally smarter than horses in several measurable domains, particularly in problem-solving, memory retention, and independent decision-making, though the scientific picture is more nuanced than a simple ranking.
Let's find outThe pig cardiovascular system is a four-chambered, closed-loop circuit built around a 200–350 g heart that pumps roughly 3–5 L of blood per minute at rest and can exceed 15 L/min during exertion.
Let's find outAn irregular heartbeat is called an arrhythmia, which means the heart's electrical signaling has slipped out of its normal rhythm.
Let's find outYes, HIDA scans are safe for the vast majority of adults and children, and the main safety concern is far smaller than most patients assume.
Let's find outYes, mammals are warm-blooded — nearly all of them. Every mammal species on Earth generates most of its own body heat internally and holds a core temperature within a narrow range, typically between 96°F and 104°F.
Let's find outYes, aspen trees are connected by their roots, and the connection runs deeper than most people realize.
Let's find outNo, lice and scabies are not the same thing. They are caused by two completely different organisms that live in different places on the body and spread in different ways.
Let's find outAre Chick-fil-A fries healthy? No, they are not a health food, but they are also not the worst fries in fast food.
Let's find outA crust forming over a wound is usually a sign of healing, not infection.
Let's find outNo, carrots are not acidic in any practical sense — raw carrots measure about pH 5.9 to 6.3, which places them on the mildly acidic side of neutral, close to milk (pH 6.5 to 6.8) and far from lemon juice (pH 2.0 to 2.3).
Let's find outAre ferrets good with dogs? The answer is yes, but only with the right dog and the right setup.
Let's find outAre leukocytes in urine serious? Usually not. Small numbers are common and often harmless, especially in women and during pregnancy. The number matters more than the presence.
Let's find outKomodo dragons are venomous, not poisonous. These monitor lizards deliver a venom containing at least 14 protein compounds through ducts in their lower jaws, and it is injected by bite rather than absorbed by touch or eaten.
Let's find outNo, ionic foot baths are not legit as a medical detox device, because the water discolors identically whether or not feet are in the basin.
Let's find outChia seeds are generally good for GERD, but only when prepared correctly. Their soluble fiber and mucilage form a gel that slows gastric emptying and buffers refluxate, which reduces reflux episodes in most people.
Let's find outMost cancer lumps are not painful, especially in early stages: the majority of malignant breast lumps, thyroid nodules, and soft-tissue sarcomas present as painless masses discovered by accident.
Let's find outAre elephants nice to humans? Sometimes, and reliably so only under specific conditions. Most elephants show no aggression toward people, and many elephants in tourist camps welcome routine handlers.
Let's find outNo. Mules are neither uniformly male nor uniformly female; both sexes are born in roughly equal numbers, but nearly all mules are sterile, so a mule never becomes a parent in the ordinary sense.
Let's find outAre cleft chins rare? A true cleft chin, a visible Y-shaped groove in the chin bone and overlying soft tissue, appears in roughly 1 in 5 to 1 in 10 people depending on the population studied, so it is uncommon but not rare.
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