Science & tech1 / 4
Why is the sky blue?
Sunlight is a mix of every colour. Air scatters short, blue wavelengths far more than long, red ones, so blue light reaches your eyes from every direction in the sky.
Quick clicks
One question at a time.
1 / 4
Everyday economics2 / 4
Same money. Why does it buy less?
Prices across the things we buy tend to rise over time. Your £20 note stays £20, but each pound buys a little less. That’s inflation.
The internet & computers3 / 4
How does the internet cross an ocean?
Mostly through fibre-optic cables laid along the sea floor. Your data travels through them as pulses of light, linking networks on different continents.
Habits & motivation4 / 4
Why is it so hard to just start?
Starting means facing a task that feels unclear, unpleasant or too big. Putting it off brings quick relief, so a smaller, clearer first step is often what gets you moving.
That’s all of them, for now.
New ones arrive every week. Tell us what should click next, or dig into the full explanations.
Swipe up, scroll, or press ↓ Space. Enter makes it click.