Explore questions from across science through evidence, mechanisms, limitations, and the explanations behind familiar claims.
Find an explanation ↓
For most women, eggs are not bad for health. Large cohort studies link up to one egg per day to no increase in heart attack or stroke risk in otherwise healthy adults, and the American Heart Association has not set a strict daily egg limit…
Read the story ↗Are bears fat? Yes, but not uniformly, and not in the way most people picture.
The human esophagus is a muscular tube about 9 to 10 inches long that carries food and liquid from the pharynx to the stomach through a two-stage pumping action called peristalsis.
Yes, cucumbers are generally fine for most people with kidney disease, with one critical caveat: portion size and preparation matter if your potassium is restricted.
Black-eyed peas are legumes, not vegetables in the botanical sense. A legume is any plant in the Fabaceae family that produces seeds in a pod, and the black-eyed pea (Vigna unguiculata subsp.
Yes, carrots are good for cholesterol, but modestly and specifically: one medium carrot (about 61 g) supplies 1.7 g of fiber, roughly 1.4–1.7 g of which is the soluble pectin that binds bile acids in the gut and forces the liver to pull…
Yes, donkeys are genuinely friendly to humans, but their friendliness runs on different wiring than a dog's or a horse's.
No, geckos are not harmful to humans. The roughly 1,500 described species of gecko are non-venomous, and none is capable of injecting venom or delivering a dangerous bite.
Yes, Bolthouse Farms smoothies are healthy only in a narrow, conditional sense.
No, elephants are not afraid of mice. The myth likely survives because it is visually funny, not because it is true.
Aloe vera symbolism centers on healing, protection, and resilience. The plant's gel, which is roughly 99% water, soothes burns and irritated skin.
Yes, carrots are generally good for arthritis and inflammation, but not for the reason most people assume. Carrots do not contain a magic anti-inflammatory compound that switches off joint disease.
The frontal lobe is the largest of the brain's four major lobes, occupying roughly one-third of the cerebral cortex and sitting at the front of each hemisphere behind the forehead.
Yes, baby monitors are safe for the overwhelming majority of families when used as intended, because the radio frequency (RF) energy they emit sits far below the exposure limits set by the Federal Communications Commission and the World…
Anthropology is the holistic scientific study of humans across all times and places, uniting four subfields: biological anthropology, archaeology, cultural anthropology, and linguistic anthropology.
Elephants are primarily prey animals, not predators. An adult elephant has no natural predator, but calves, and adults weakened by drought, injury, or poaching, are killed by lions, spotted hyenas, and wild dogs across Africa.
Deadlifts are not inherently dangerous; they are dangerous in proportion to how much load you place on a spine that is not prepared for it, and the vast majority of injuries are muscular strains rather than spinal fractures.
Amino acids are the nitrogen-containing molecules that serve as the individual building blocks of proteins. Twenty standard amino acids, encoded by the genetic code, link through peptide bonds to form every protein in the human body.
Are dolphins smarter than octopuses? Not in any single measurable sense, because they are intelligent in different currencies.
Yes, third cousins are blood related, but only barely. Third cousins share a pair of great-great-great-grandparents and, on average, about 0.781 percent of their DNA, which works out to roughly 53 centimorgans across about 73 shared…
Lentils are both a carbohydrate and a protein food, and the label depends on which side of the plate you measure.
Yes, boiled eggs are healthy for most people. A large boiled egg delivers about 6.3 grams of complete protein, 72 calories, and 147 milligrams of choline for roughly USD 0.30, with no added fat because the shell seals the egg during…
Yes, grapes are high in sugar compared with most fruits, but "high in sugar" and "bad for blood sugar" are not the same claim.
Are foot cramps a sign of early pregnancy? They can be, but they are a weak and nonspecific one.
AI-generated editorial images · Image policy
Show Me