500 million flaps -- with resilin

Scientists have synthesised resilin, the rubber-like substance that enables bees and insects to store and release energy and perform millions of athletic feats. And the prospects?:

it could be used in everything from sports shoes to artificial arteries and spinal parts that would not wear out despite being flexed 100 million times. “That's how many times you move your back in 50 or 60 years,” [Dr Chris Elvin, from CSIRO Livestock Industries in Brisbane] said.