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. ↓Yes, you can wear breast pads without a bra. The pad must stay anchored to fabric or skin through adhesive backing, clothing pressure, or a fitted inner layer, because gravity and nipple friction will dislodge a loose pad within minutes.
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You can sometimes walk on a torn calf muscle, but whether you should depends on the tear's grade and location. A low-grade strain in the gastrocnemius often allows walking with a limp within days.
A little more about this →No, you generally cannot and should not walk on a freshly broken tibia.
A little more about this →Yes, you can vomit through your nose. When the soft palate fails to seal off the nasal cavity during a forceful vomit, gastric contents can exit through the nostrils.
A little more about this →No. A regular human pregnancy test cannot detect pregnancy in a dog. These tests are built to detect human chorionic gonadotropin in urine, a hormone dogs do not produce during pregnancy.
A little more about this →No. You cannot use period blood for a blood type test. Menstrual fluid is a mixture of blood, endometrial tissue, cervical mucus, and vaginal bacteria, and its red cells are partly broken down by enzymes in the uterus and vagina.
A little more about this →Yes, you can use a steroid cream on your face safely, but only under conditions most people never check: the right potency, the right duration, and a diagnosis that actually calls for it.
A little more about this →Yes, miconazole can be used on dogs, but only under veterinary direction. It is an antifungal approved for treating yeast and fungal skin infections, yet the right formulation, concentration, and duration depend on the diagnosis.
A little more about this →Yes, you can use hydrocolloid bandages on acne, and they are most useful on whiteheads and pustules that have already come to a head. They will not clear hormonal cystic acne, prevent new clogged pores, or replace proven acne treatments.
A little more about this →Yes, you can use egg whites for egg wash. A white-only wash binds, seals, and dries glossy and colorless, so it works well for pastries, breads, and anything that needs a clear shine.
A little more about this →Yes, you can use Gain detergent with a septic tank. Gain is a conventional, low-phosphorus synthetic detergent, and the phosphorus restrictions that once made detergents a septic concern were phased out of U.S.
A little more about this →No. Eyelash glue and nail glue cure by different mechanisms, so eyelash glue cannot hold artificial nails under normal wear.
A little more about this →Yes, an expired suppository can often still be used, but only after checking its physical condition and only for non-critical situations; for serious infections, pregnancy, immunosuppression, or any life-threatening condition, replace it.
A little more about this →Yes, you can use bottled water in a CPAP machine, but only certain types. Distilled bottled water is safe and works exactly like distilled tap water from a jug.
A little more about this →No. Diesel engine oil should not go into a gasoline engine. The two lubricants are built for different combustion chemistry, different temperatures, and different emissions hardware.
A little more about this →Can you use alkaline water instead of distilled? Usually no, if the purpose is to replace distilled water.
A little more about this →Yes. A person with an established oral herpes infection can transfer the virus to their own genitals, usually by touching a cold sore and then touching the genital area without washing their hands in between.
A little more about this →No, you should not trim a cat's whiskers. Whiskers are not hair in the cosmetic sense; they are touch organs wired to a dedicated sensory system, and cutting them degrades balance, spatial judgment, and night navigation until they regrow.
A little more about this →Yes, you can travel on dialysis. Hemodialysis patients can book "transient" or visitor sessions at another clinic, and peritoneal dialysis patients can carry supplies and perform exchanges anywhere with clean space and electricity.
A little more about this →No, you cannot think yourself to death directly, but chronic catastrophic thinking can raise real physiological risk through sustained cortisol exposure, sleep disruption, and health-damaging behavior.
A little more about this →Yes, you can test some electrolytes at home, but only a narrow slice of them, and the results are not equivalent to a blood panel. Consumer devices reliably measure sodium and potassium in urine and estimate hydration from conductivity.
A little more about this →No. An ultrasound cannot tell you whether a lump is cancerous on its own. It shows shape, texture, blood flow, and stiffness, and radiologists use those features to sort lumps into risk categories. But imaging never confirms cancer.
A little more about this →Yes, urine testing can detect several sexually transmitted infections, but it cannot screen for all of them. Urine is an approved and reliable sample for chlamydia and gonorrhea, and it is used for trichomoniasis in some settings.
A little more about this →No—not from a routine blood test. A regular blood test, meaning a complete blood count or basic metabolic panel ordered at an annual physical, cannot tell you whether you have HIV.
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