The Big Bang, Explained
The Big Bang is the leading scientific explanation for how the universe began: not an explosion in space, but the expansion of space itself…
Dr. Nadia Okoro
Science
Research, discovery and the natural world — from the cosmos to the cell.
74 stories
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Antibiotic Resistance Explained
Antibiotic resistance is when bacteria evolve so that the drugs meant to kill them stop working. Here is how it develops, why the World…
Dr. Nadia Okoro
What Is Electricity?
Electricity powers nearly everything we use, yet few of us could say what it actually is. This guide explains electric charge, current…
Dr. Nadia Okoro
How Do Magnets Work?
Magnets pull and push without touching, yet the reason why is rooted in the behaviour of electrons. This guide explains magnetic fields…
Dr. Nadia Okoro
What Is Radioactivity?
Radioactivity is the natural process where unstable atoms shed energy as radiation. This guide explains the types of radiation, what…
Dr. Nadia Okoro
What Is the Scientific Method?
The scientific method is the step-by-step approach scientists use to test ideas against evidence. This guide explains how it works, why…
Dr. Nadia Okoro
Comets, Asteroids and Meteors: What's the Difference?
Comets, asteroids, meteoroids, meteors and meteorites are easy to confuse. This guide explains what each one is, what they are made of…
Dr. Nadia Okoro
What Is a Virus? (The Biology)
A virus is a tiny package of genetic material that can only reproduce by hijacking living cells. This guide explains what viruses are made…
Dr. Nadia Okoro
What Causes the Seasons?
The seasons are caused by the tilt of Earth's axis, not its distance from the Sun. This guide explains why the tilt matters, why the…
Dr. Nadia Okoro