科学美国人60秒 SSS 2014-10-10（在线收听）

 how many times does it happens to youmyou start to fall but then catch yourself and continue on your way. well new reaearch shows that falling and catch yourself actually happens everytime you take step and that we persicesly palces we walk to avoid taking a tumble during this abulaw touring balancing act. this study in the general biology letters when humans  walk we put one foot in fornt of the other, but the way each foot land can barry from step to step. this ferey anient foot playsman can appear pretty randam. but reasearchers decide to take a closer look. they fitted ten volunteers with motion capture morgers and then watched the subject walk on a tride mail. the invetgater just covered that they could pretacted exactly each wherefoot will fall based on the movements of the persons powers during the previous step.the body falls foreword  in said ways as we walk and the feet come down the way that we store our balance. the findings could useful for developing ways to help people with movement disorders regain steadbility. the inbook also make walking roborts more shrt footed, so they don't, you know, fall down on the job.