Life on Earth

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Acme Crow Call

Produce the call of young and old crows

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Mushrooming Without Fear

Introduction to edibles

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The Shape of Life

Presents the full diversity of life

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Sol: Sun Clock

How many more hours of sunlight remain in the day?

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Lightly On The Land

Trail building best practices

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The Sun: Rise and Fall

Simple iOS App Displays Sunset and Sunrise Times

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Indoor/Outdoor Humidex Thermometer

Wireless Thermometer With Comfort Level Reading

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Manual of Field Geology

The go-to geology field guide

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Weather data visualization

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Meteorite Hunting

How to find space rocks

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