ScienceFriendly introductions to questions from across science. Start with something familiar, discover the explanation, and keep exploring.
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As of November 2026, no commercial probiotic in the United States or European Union contains live Faecalibacterium prausnitzii, and none has been approved as a drug or supplement ingredient.
Read the story ↗No. Tobacco and weed (cannabis) are not the same, even though both are smoked plant material delivering psychoactive drugs through the lungs.
Let's find outYes, tinnitus and vertigo are related, but not in a one-to-one way: they are sibling symptoms that often arise from the same inner-ear and vestibular-nerve pathology rather than from each other.
Let's find outNo, there are no squirrels in Australia. The continent has no native squirrel species, and none of the world's roughly 280 squirrel species (family Sciuridae) has ever established a wild population there.
Let's find outYes, there are otters in New York, and two different species live in the state: the North American river otter in fresh waters statewide and the sea otter in the coastal ocean, where sightings are rare but increasing.
Let's find outNo, the scientific consensus is that milk from rBST-treated cows is not measurably different in safety from other milk, and no major health authority has found a health risk from drinking it.
Let's find outYes, there are mosquitoes in the UK, and they are a genuine but limited public health risk. Around 34 native mosquito species breed across Britain, and the widespread Culex pipiens complex is the country's most common biting mosquito.
Let's find outThere is no established breeding population of mountain lions in New York State, and state wildlife officials consider the species functionally absent, probably extirpated by the late 1800s.
Let's find outNo, there are no muscles in your fingers. The fingers contain only bones, joints, tendons, ligaments, blood vessels, and skin.
Let's find outYes, there are crocodiles in Mexico. The country hosts three crocodilian species across its coastal and riverine habitats: the American crocodile in brackish lagoons and river mouths, the Morelet's crocodile in freshwater rivers of the…
Let's find outYes, there are different types of hazel eyes. Hazel is not one color but a continuum, and clinicians and color analysts commonly sort it into five subtypes: classic golden hazel, green-dominant hazel, brown-dominant hazel, gray-hazel, and…
Let's find outNo, brown recluses do not live in Arizona. The state sits entirely outside the established range of Loxosceles reclusa, which is anchored in the central and southeastern United States and stops well short of the Arizona border.
Let's find outYes, mosquitoes are still active in the fall, and in much of the United States they remain a biting nuisance well into October. The season does not end on a calendar date; it ends when sustained cold arrives.
Let's find outYes, lymph nodes sit under and around the breast, but they are not buried inside the fatty tissue itself. The nodes people feel as "under the breast" belong to the axillary (armpit) and infraclavicular (below the collarbone) groups.
Let's find outYes, measurable average differences in the corpus callosum exist between males and females, but they are small, overlap heavily between the sexes, and most claims about what they mean are unsupported.
Let's find outYes, crab farms exist, and they are a major global industry.
Let's find outYes, Texas has fault lines, and they are both numerous and active.
Let's find outNo, there are no lymph nodes on your ribs themselves. Ribs are bone, and bone contains marrow but no lymph node tissue.
Let's find outYes, there are bones in your nose, but not in the part you can pinch.
Let's find outNo, Utah has no resident population of brown bears or grizzlies. The last confirmed grizzly in the state was killed in 1923 in the Wasatch Mountains, and the species has been absent as a breeding animal for roughly a century. The U.S.
Let's find outYes, there are bears in the Finger Lakes, but they are black bears (Ursus americanus), not grizzlies, and they are sparse residents rather than a fixture of the region.
Let's find outYes, Tennessee has wild hogs, and they are an invasive species found in roughly 80 of the state's 95 counties.
Let's find outYes, there are different types of autism, but not in the way most people imagine.
Let's find outYes, crocodiles exist in Spain, but not as a breeding wild population. No native crocodilian lives in mainland Spain or the Balearic Islands.
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