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Health
Clear, carefully sourced explainers on health topics relevant to everyday life.
How Antibiotics Work and Why They Fail Against Viruses
Antibiotics kill bacteria by attacking structures viruses don't have. Learn how they work, why they can't cure a cold, and what drives antibiotic resistance.
What Is a Healthy Resting Heart Rate by Age and Fitness
A normal resting heart rate for adults is 60-100 bpm, but fitter hearts beat slower. Learn the healthy ranges by age, how to measure yours, and what it means.
How Much Sleep Do You Actually Need, by Age
From newborns to older adults, official sleep guidelines vary widely by age. Here's how much sleep you actually need, according to sleep medicine research.
Understanding Blood Pressure Numbers — What They Mean
What do the two numbers in a blood pressure reading actually mean? A clear explanation of systolic and diastolic pressure and official health categories.
The Difference Between a Cold and the Flu — How to Tell
Both cause coughing and congestion, but colds and the flu differ in onset, severity, and cause. Here's how to tell them apart and when to see a doctor.
How Chronic Stress Actually Affects the Body
Stress is more than a feeling — it triggers real hormonal and physiological changes. Here's how chronic stress actually affects the body over time.
The Difference Between Type 1 and Type 2 Diabetes
Both involve blood sugar regulation problems, but type 1 and type 2 diabetes have very different causes, onset patterns, and treatment approaches.
How the Immune System Actually Works
Your immune system fights off millions of threats daily through a layered defense system. Here's a clear explanation of how immunity actually works.
What Is the Gut-Brain Connection
Your gut and brain are in constant two-way communication via nerves, hormones, and gut bacteria. Here's what science actually knows about this connection.