What Is a Black Hole?
A black hole is a region of space where gravity is so strong that nothing, not even light, can escape. This clear guide explains how black…
Dr. Nadia Okoro
Dr. Nadia Okoro
Science & Health Writer
Dr. Nadia Okoro holds a PhD in molecular biology and writes about medicine, public health and scientific research with an emphasis on evidence.
Credentials: PhD, Molecular Biology
What Causes Earthquakes?
Earthquakes happen when stress built up in the Earth's crust is suddenly released along faults. This guide explains plate tectonics, how…
Dr. Nadia Okoro
The Theory of Evolution, Explained
Evolution by natural selection is the process that explains the diversity of life on Earth. This clear guide covers how natural selection…
Dr. Nadia Okoro
Photosynthesis Explained
Photosynthesis is how plants, algae and some bacteria turn sunlight, water and carbon dioxide into food and oxygen. This clear guide covers…
Dr. Nadia Okoro
How Vaccines Work
Vaccines train your immune system to recognise a germ before you ever meet the real thing. This plain-English guide explains antibodies…
Dr. Nadia Okoro
How to Reduce Your Alcohol Intake: What Actually Works
Most people who want to drink less struggle to make it stick. Here is what the evidence shows about effective strategies and when…
Dr. Nadia Okoro
The Gut Microbiome: What It Is and Why It Matters
Your gut hosts around 100 trillion microorganisms, and a landmark 2018 study suggested eating 30 different plants a week supports a…
Dr. Nadia Okoro
How to Reduce Screen Fatigue and Eye Strain
Hours of screen time can leave eyes dry, tired and sore - a set of symptoms known as digital eye strain. Here is why it happens and the…
Dr. Nadia Okoro
The Underrated Benefits of Walking
Walking is free, low-risk and remarkably good for both body and mind - yet it is often dismissed as too gentle to count. Here is what…
Dr. Nadia Okoro