ScienceFriendly introductions to questions from across science. Start with something familiar, discover the explanation, and keep exploring.
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Yes, bottle warmers are safe for breast milk when used to warm it gently to body temperature or below, and when the milk is not held at high heat for long periods.
Read the story ↗Are mashed potatoes actually good for weight loss? Yes, with two conditions: they must be prepared without added butter, cream, or cheese, and eaten in controlled portions.
Let's find outYes, the thumb is a finger in every technical sense: it is one of the five digits of the human hand, it grows from the same embryonic tissue, and it is built from the same three bone segments (phalanges) as your other four.
Let's find outAn MRI of the cerebellum is a magnetic resonance imaging scan that uses a strong magnetic field and radio waves, not radiation, to produce detailed pictures of the cerebellum, the fist-sized structure at the back of the brain that…
Let's find outArborvitae trees need roughly 1 inch of water per week, delivered slowly to the root zone, with the first two growing seasons being the most critical. Water deeply once or twice weekly rather than lightly and often.
Let's find outAre keto pills safe for seniors? For most healthy adults over 65, occasional use of a single-ingredient ketone supplement is low-risk, but "keto pills" is a catch-all label covering three very different products with very different hazard…
Let's find outAre Braxton Hicks contractions bad or dangerous? No. In an uncomplicated pregnancy, Braxton Hicks contractions are a normal, harmless feature of the uterus preparing for labor, and they do not dilate the cervix or harm the baby.
Let's find outYes, personality disorders are real. They are recognized in two major diagnostic systems — the DSM-5-TR and the WHO's ICD-11 — as enduring patterns of inner experience and behavior that diverge from cultural expectations and cause…
Let's find outNo—eggs are not bad for most cancer patients, and in fact they are one of the most practical protein sources during treatment.
Let's find outYes, chin-ups are one of the most effective lat exercises available, because the latissimus dorsi acts as the primary shoulder extensor and adductor in every repetition.
Let's find outYes, grape tomatoes are low FODMAP in small servings of about 45 grams, or roughly three to four cherry-sized tomatoes, per the 2017 Monash University FODMAP guidelines that underpin most clinical advice.
Let's find outAn anomaly scan in pregnancy is a detailed mid-pregnancy ultrasound, usually performed between 18 and 22 weeks of gestation, that examines the baby's anatomy for structural abnormalities and confirms growth, placental position, and…
Let's find outHuntsman spiders are venomous but not dangerous to humans. Their venom is a fast-acting neurotoxin built to paralyze insects and small vertebrates, and it is far too weak to threaten a person.
Let's find outYes, black-footed yellow sac spiders are venomous — almost every spider is — but their venom is weak against humans and a bite is rarely dangerous.
Let's find outYes, long arms are generally an advantage in boxing, but a conditional one.
Let's find outYes, facial expressions are part of sign language. In signed languages such as American Sign Language (ASL), the face, head, and upper body carry grammatical information that has no spoken equivalent: they mark sentence type, scope,…
Let's find outYes, benzodiazepines are depressants — specifically, central nervous system depressants that slow brain activity by boosting the inhibitory neurotransmitter GABA at roughly 40 percent of GABA-A receptor subtypes.
Let's find outAre cosmos flowers edible? Yes, the petals of Cosmos bipinnatus and Cosmos sulphureus are edible and have been used as a mild garnish for centuries, but the plant is not a food crop and comes with real caveats.
Let's find outBrown centipedes (Lithobius forficatus, the stone centipede) are not dangerous to humans in any medically meaningful sense.
Let's find outYes, the blue whale is larger than any dinosaur that ever lived, and it holds that record in two separate ways.
Let's find outAluminum chlorohydrate and aluminum zirconium are both antiperspirant salts that physically plug sweat ducts, but aluminum zirconium formulations are roughly 1.5 to 2 times more effective at suppressing sweat because zirconium cross-links…
Let's find outNo, hyenas are not mean in any meaningful sense. They are not cruel, spiteful, or malicious, because those words describe intent, and intent requires a kind of cognition hyenas do not have.
Let's find outNo, granddaddy long legs are not poisonous to humans. The harvestman, a true arachnid with one fused body section, has no venom glands and no fangs capable of piercing skin.
Let's find outNo, all inhalers are not the same. They differ in propellant, particle size, airflow requirement, and lung deposition, which is why two inhalers containing the identical drug can produce different clinical results.
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