The Viafocus library
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The Wait — How does radar work, and how does it find a plane nobody can see?
29 questions · 16 min

Wake the Needle — What is a magnet, and how does a compass work?
26 questions · 15 min

Nobody Leads — How do thousands of birds fly in one flock without crashing?
12 min

Three and a Bit — Why is pi 3.14, and what is pi actually measuring?
28 questions · 15 min

Six Nights — Why do you have to finish your antibiotics even when you feel better?
11 questions · 9 min

Beat the Flag
21 questions · 12 min

The Map Lied — Why does Greenland look as big as Africa on a world map?
13 questions · 12 min

Thin Ice — What is pressure?
11 questions · 7 min
Five Ways to Lift a Piano
15 min

Two Stickers — Is 50% off then 20% off really 70% off?
11 questions · 8 min

Räkna åskan — hur långt bort är blixten?
10 questions · 8 min

Glasmästarens fönster — hur stor del av figuren är färglagd?
11 questions · 12 min