Mystery #1Tier 1microbes / size / eyesight
Why can germs make you ill when you cannot see a single one?
A germ can knock you flat in bed for days. Yet you can hold your hand right up to your face, stare as hard as you like, and see nothing there at all. Something powerful enough to make your whole body ache is somehow completely invisible. How can a living thing be that small?
Your guess
What is your hunch: why can nobody see a germ just by looking?
There's no single magic word to type, have a go in your own words, then reveal the answer to see how close you got.
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