A fresh, approachable read on questions from across science. Explore everyday observations, surprising connections, and the explanations worth slowing down for.
A slower read. A wider world of science. ↓A COPD case study follows one patient with spirometry-confirmed airflow obstruction through diagnosis, inhaler escalation, a hospitalized exacerbation, and pulmonary rehabilitation.
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At 7 weeks pregnant, your embryo measures about 0.4 to 0.5 inches (10 to 13 millimeters) from crown to rump—roughly the size of a blueberry—and weighs under 1 gram.
A little more about this →At 9 days past ovulation (9 DPO), most people feel nothing unusual, and that is normal. Any symptoms you notice now are most likely caused by progesterone, the hormone that peaks in the second half of every cycle, not by a pregnancy.
A little more about this →The 4-month sleep regression is a real, developmentally driven disruption in infant sleep that typically begins between 3.5 and 4.5 months and lasts two to six weeks. It is not caused by bad habits or parental inconsistency.
A little more about this →The Neanderthals (Homo neanderthalensis) were a distinct human species that lived across Europe and western Asia from roughly 430,000 to 40,000 years ago, adapted to cold climates with a stocky build, a large brain averaging about 1,600…
A little more about this →The seven kinds of gait are normal gait, antalgic gait, ataxic gait, hemiplegic (circumduction) gait, Parkinsonian (festinating) gait, steppage gait, and waddling (Trendelenburg) gait.
A little more about this →Rats live on every continent except Antarctica, and their distribution is almost entirely a byproduct of human settlement rather than wild habitat preference.
A little more about this →Bananas grow in a narrow tropical band between roughly 30° north and 30° south latitude, with commercial production concentrated in about 135 countries across Latin America, the Caribbean, West Africa, and Southeast Asia.
A little more about this →The seven gym exercises to avoid with tennis elbow are the straight-bar bench press, dead hangs and pull-ups, heavy deadlifts and farmer's carries, straight-bar biceps curls, overhead barbell presses, dips and close-grip bench presses, and…
A little more about this →A simple brain diagram with labeled parts shows three main structures: the cerebrum (the folded outer layer handling thought, movement, and senses), the cerebellum (the ridged lobe at the back coordinating balance and timing), and the…
A little more about this →17-OH progesterone testing with LC-MS (liquid chromatography–tandem mass spectrometry) measures the steroid 17-hydroxyprogesterone in serum or dried blood spots using chromatographic separation followed by mass-selective detection.
A little more about this →16S rRNA is a structural RNA molecule, roughly 1,542 nucleotides long in Escherichia coli, found in the small ribosomal subunit of all bacteria and archaea.
A little more about this →At 2 months, most babies can hold their head briefly steady when upright, track a face across the midline, and produce social smiles in response to a voice, while the early primitive reflexes (Moro, rooting, asymmetric tonic neck) begin…
A little more about this →A 2 month old coughing is usually a normal airway-clearing reflex, but at this age it deserves closer attention than at any other point in infancy.
A little more about this →A 12 month old sleeping so much is usually normal: most one-year-olds need 11 to 14 hours of sleep per 24 hours, split between one or two naps and 10 to 12 hours at night.
A little more about this →Sleep deprivation degrades cognition through a predictable sequence: attention fails first, working memory and emotional control follow, and high-level judgment collapses last.
A little more about this →At 10 weeks old, a baby is typically 22 to 24 inches long and weighs 10 to 14 pounds, roughly double birth weight is still ahead but the curve is steep.
A little more about this →A blood pressure reading of 115/71 is normal and generally reassuring: it sits comfortably inside the normal range defined by the 2017 ACC/AHA guidelines, which classify normal as systolic below 120 and diastolic below 80.
A little more about this →There are 12 recognized dental specialties, each requiring two to six years of post-doctoral residency beyond the four-year Doctor of Dental Surgery or Doctor of Dental Medicine degree: dental public health, endodontics, oral and…
A little more about this →Vaping is not harmless, but the 10 dangers of vaping are not all equal: the strongest human evidence links e-cigarettes to nicotine addiction, EVALI lung injury from contaminated black-market liquids, and measurable blood-vessel and airway…
A little more about this →20 mg of CBD is a low oral dose that most adults absorb poorly. Fasted, roughly 6 percent reaches circulation, so about 1.2 mg of the dose enters your bloodstream.
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