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When we first came to Johnson Canyon, we did not have any cell phone service or internet. I could still check email by climbing to the top of the bluff. Why does being higher let me get a signal for the internet?


Cell phone signals are limited by distance, but they also travel in straight lines, so they can be blocked by obstacles. We are staying down in the valley, and the valley walls block the signal. By climbing above the valley walls, I can reach the signals that are traveling in straight lines over the bluffs.