Lenore Rasmussen’s dream of developing a synthetic muscle that could be used to make better prosthetic limbs and more responsive robots will literally become airborne at 4:33 p.m. on April 13 when her experiment will rocket off to the International Space Station from Cape Canaveral in Florida. Rasmussen, a synthetic polymer chemist and founder of Ras Labs, has worked closely with researchers and engineers at the Princeton Plasma Physics Laboratory (PPPL) to develop the material’s ability to adhere to metal.