
From Lori Emerson: “In need of a practical way to overcome social isolation; communicate emergencies, weather, and crop prices, farmers began to take advantage of the growing ubiquity of both telephone sets and barbed wire fencing. They would hook up telephones to wire strung from their homes to a nearby fence; at the time, telephones had their own battery which produced a DC current that could carry a voice signal; turning a crank on the phone would generate an AC current to produce a ring at the end of the line. These networks had no central exchange, no operators–and no monthly bill. Instead of ringing through the exchange to a single address, every call made every phone on the system ring. Soon each household had its own personal ringtone…but anyone could pick up. Reportedly, the quality of the signal traveling over the heavy wire was excellent, but weather would frequently cause short circuits.”
An elite rock climber lost his vision so he found a way to climb blind

From the Washington Post: “Molly Thompson craned her neck so she could make out the man climbing the tower of red rock. Squinting into the desert sun, she tried to identify a crack he could grab on to or a ledge wide enough for his foot. The climber, struggling to keep his grip, was her husband, Jesse Dufton. His left arm trembled from the effort. His foot probed for a more secure hold, but found nothing. “A little bit higher there should be a foothold,” Molly said into a headset. When Jesse extended his foot again, it missed the tiny outcropping. He returned his foot to its original position and tiptoed on three millimeters of quartzite, 200 feet above the ground. He did not look down. He did not look anywhere. Jesse has advanced rod-cone dystrophy. Put another way: He is completely blind. And another: He is one of the world’s few elite blind rock-climbers.”
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