Japan's worsening bear problem has created a shortage of handmade "Monster Wolf" robots, which are $4,000 solar-powered scarecrow-like devices with glowing eyes, sensors, and blaring sounds designed to frighten the animals away. "We make them by hand. We cannot make them fast enough now. We are asking our customers to wait two to three months," company president Yuji Ohta recently told the AFP. Popular Science reports: First released in 2016 by the manufacturer Ohta, Monster Wolf was original...

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