An idea
Sound and echoes
Ripples you can hear
Every sound you have ever heard was air, or water, gently pushed. The push travels outward in ripples, and something at the other end feels them: an eardrum, a bone, a whole body.
The clever part is what animals do with the ripples that come back. Send out a sound, listen for its echo, and the dark stops being empty. It becomes a map.
The shape of it
Where it turns up
6 nights that touch this idea.
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Hearing
The science of sound waves
Ripples in the air reach a small drum, and three tiny bones pass them inward.
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Whale Songs
The ocean's lullaby
Low notes travel enormous distances through the sea, far beyond any shout in air.
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Dolphins
Riding the waves
Clicks go out, echoes come back, and a dolphin reads the dark water by sound.
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Bats
Masters of the dark
The same trick as the dolphin, but in air, and far too high for us to hear.
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Thunder & Lightning
The sky's electric lullaby
Thunder is the sound of air expanding after the flash. Light wins the race every time.
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Steam Train
The rhythm of sleep
A rhythm made of released steam, one chuff for each turn of the wheels.
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