You are a stick that can walk.

When your shadow is as long as you are, the sun has told you something.

Stand in the sand. You throw a shadow, same as any stick. Morning: the shadow is a giant. Noon: it crawls back toward your feet. There is a moment — you can wait for it — when the shadow is exactly as long as you are tall. At that moment the sunlight is leaning 45°, halfway from the horizon to straight up. You just measured the sky with your body.

you=your shadow

Drag the sun. When the two lengths match, the picture will say so.

In your life

You can do this in a parking lot. When your shadow matches you, the sun is halfway up the sky. No app required. Your body is the ruler.

Where the sun sits45°

Wait until you and your shadow match.

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