Have you ever wondered why some slopes are stable and others are not? What causes landslides and mudslides? The angle of the slope and the size of the material makes a big difference. If trees curve, this can indicate an unstable slope. Vegetation also increases a slope's stability.

Music:

"Enchanted Valley" Kevin MacLeod (incompetech.com)
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Videos and Images:

Videvo.net
Pixabay.com
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United States Geological Survey (USGS)

"Geotropism" Mathieu Rodriguez
Licensed under Creative Commons: By Attribution 3.0 License
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"Sandpile" Rodrigo Tetsuo Argenton
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