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Science & Discovery
Science is a method of being wrong productively. From the very small to the very fast, these lessons explain the ideas that survived the testing.
2 lessons · 1 quiz
Lessons
Science & Discovery/intermediate
How Vaccines Teach the Body Without Danger
A vaccine is a rehearsal. It shows the immune system a harmless piece or version of a pathogen so that the real thing is recognised before it can take hold.
7 min read
Science & Discovery/beginner
Why the Sky Is Blue and Sunsets Are Red
Sunlight is white only until it meets air. The way small molecules scatter short wavelengths explains both a blue midday sky and a red sunset.
4 min read
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