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  1. Chemistry

    How Does Baking Soda Whiten Teeth? The Science

    Baking soda can remove surface stains through gentle abrasion and pH changes, but it has real limits. Here’s what the science actually says.

    By Kaitlyn Gilliam
  2. Chemistry

    What Percent Isopropyl Alcohol Is Best for Cleaning?

    70% isopropyl alcohol kills more germs than higher concentrations. Learn why water content matters and when to use stronger solutions.

    By Jodie Waters
  3. Environment

    Why Is It So Smoky Outside and How to Stay Safe

    Wildfire smoke can travel hundreds of miles and harm your lungs. Learn why the air gets hazy, what it does to your body, and how to stay safe indoors.

    By Denise Vega
  4. Chemistry

    What Is Red 3 Made Of? Petroleum, Iodine & More

    Red 3 is a synthetic dye made from petroleum and iodine. Learn what it is, where it’s been used, and why regulators have moved to restrict it.

    By Lucia Castellanos
  5. Genetics

    How Common Is Triple X Syndrome and Why It Goes Undiagnosed

    Triple X syndrome affects 1 in 1,000 women, yet most never know they have it. Here’s what it involves and why it so often goes undetected.

    By Liz Livingston
  6. Environment

    How to Get Rid of Pollen From Your Home and Yard

    Practical ways to reduce pollen in your home and yard, from air filters and nasal rinses to smarter laundry habits and pet care.

    By Luke Tully
  7. Environment

    What an Air Quality Alert Means for Your Health

    Learn what air quality alerts mean for your health, who’s most at risk, and simple ways to protect yourself when pollution levels rise.

    By Susan Duncan
  8. Genetics

    How Did Sickle Cell Anemia Start? The Malaria Link

    Sickle cell anemia persists because the same mutation that causes it also offers protection against malaria — a genetic tradeoff shaped by thousands of years of evolution.

    By Niloufar Munoz
  9. Physics

    How to Survive a Falling Elevator, According to Science

    Free-falling elevators are rare, but if it happens, science says lying flat gives you the best chance of survival. Here’s what actually works.

    By Dev Mehta
  10. Environment

    How to Dispose of Pill Bottles: Recycle, Donate, or Reuse

    Most pill bottles can’t go in your curbside bin, but there are still good options for recycling, donating, or reusing them responsibly.

    By Tara James
  11. Environment

    What Does Zero Water Filter Out of Your Tap Water?

    ZeroWater removes lead, PFAS, chlorine, and more, but also strips beneficial minerals. Here’s what actually gets filtered and what doesn’t.

    By Tomas Schäfer
  12. Genetics

    How to Get Genetic Testing Done: Options and Costs

    From clinical tests to at-home kits, here’s what to expect when getting genetic testing, including costs, insurance, and how to read your results.

    By Hayley Andrews
  13. Chemistry

    What Are Yoga Mats Made Of? PVC, Rubber & More

    From PVC to natural rubber and cork, learn what yoga mats are actually made of and how each material affects grip, durability, and feel.

    By Naomi Ito
  14. Environment

    Why Are Candles Bad for You? The Real Health Risks

    Candles can release soot, chemicals, and pollutants into your home air. Here’s what the research says and how to burn them more safely.

    By Miguel Orellana