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…
How Do Rainbows Form?
A rainbow forms when sunlight is bent, split and reflected inside raindrops, spreading white light into a band of colours. This…
What Is a Balanced Diet?
A plain-English guide to what a balanced diet means in practice, using the NHS Eatwell Guide: the food groups, rough proportions…
Understanding Food Additives and E-Numbers
A plain-English guide to food additives and E-numbers: what they are, the main types, how they are tested for safety, and how to…
What Is a Galaxy?
A galaxy is an enormous, gravity-bound system of stars, gas, dust and dark matter. This guide explains what galaxies are made of…
How Does the Human Eye Work?
The eye works like a living camera, bending light onto a light-sensitive screen at the back and sending signals to the brain…
How Do Solar Eclipses Happen?
A solar eclipse happens when the Moon passes directly between the Earth and the Sun, casting its shadow on our planet. Here is…
How to Reduce Your Sugar Intake
Cutting back on sugar is one of the simplest ways to improve your diet, but it is easy to get wrong. Here is which sugars to…
What Are Tectonic Plates?
Tectonic plates are the giant slabs of rock that make up the Earth's outer shell, drifting slowly over the hot interior. Here is…