There’s an urban legend that a piece of paper can’t be folded in half more than eight times, as one fold makes it double in thickness, a process called exponential growth, according to IFLScience. By ...

Imagine this: With a simple flash of light or heat, an unassuming piece of paper folds itself into a crane and, as the light pulses, flaps its paper wings in flight. Though the concept is still in its ...