A blind American man taught himself to navigate using echolocation. His hobbies include hiking and mountain-biking, and he has now trained over 500 students in his ‘tongue-click’ technique.
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Putting your car alarm remote under your chin or beside your head increases its range.
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In 2011, an elderly woman from Memphis who ordered pizza everyday for 3 years straight was saved by a delivery woman when she failed to place an order for 3 days.
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