How Does GPS Work?
GPS pinpoints your location by timing radio signals from a fleet of satellites orbiting thousands of miles overhead. Here is the science of…
Dr. Nadia Okoro
417 reading now
Science
Research, discovery and the natural world — from the cosmos to the cell.
185 stories
How Do Clinical Trials Work?
Clinical trials are carefully designed studies that test whether a new treatment is safe and effective in people. Here is how they progress…
Dr. Nadia Okoro
421 reading now
Renewable vs Non-Renewable Energy
Renewable energy comes from sources that replenish naturally, while non-renewable energy comes from finite stocks that run down as we use…
Dr. Nadia Okoro
355 reading now
What Is the Jet Stream?
The jet stream is a fast, high-altitude ribbon of wind that steers weather systems across the globe. Here is what it is, why it forms, and…
Dr. Nadia Okoro
426 reading now
What Is a Chemical Reaction?
From rusting iron to baking a cake, chemical reactions are happening all around us. This guide explains what a chemical reaction is, how to…
Priya Anand
429 reading now
What Is Condensation?
Misty windows, dewy grass and the drops on a cold drink are all condensation at work. This guide explains what condensation is, why it…
Priya Anand
458 reading now
What Is the Doppler Effect?
Why does an ambulance siren drop in pitch as it speeds past? The answer is the Doppler effect. This guide explains how it works, with…
Priya Anand
402 reading now
What Is a Cell? Biology Basics
Every living thing, from bacteria to blue whales, is built from cells. This guide explains what a cell is, what is inside one, and how…
Priya Anand
394 reading now
What Is Osmosis?
Osmosis quietly keeps every living thing alive, yet most people only half-remember it from school. This guide explains what osmosis is, why…
Priya Anand
367 reading now