For centuries, washing laundry has always required a "particular" cleaning agent —from ashes and silicates of the Egyptians to your mom’s choice of detergent— to go with water. But a group of young ...

That 1970s retrofuturistic model known as the Ultrasonic Bath (but was more lovingly referred to as the "human washing machine") was a huge hit when it was showcased at the Expo by Sanyo – but it's ...