Spacewalks explained: How humans learned to work outside Earth

(Image credit: Nasa)Anil Menon's first spacewalkFrom survival to skillSpacewalk by the numbersWhy space never gets easierA Spacewalker's LifelineWhen spacewalks became construction workThe next frontierThree Spacewalks scheduled in AugustBENGALURU: Imagine opening the hatch of the International Space Station. Inside the station, astronauts spend hours breathing pure oxygen. Mission controllers on Earth know precisely where the astronauts should be every minute of the journey.Even then, the real challenge only begins outside. A typical ISS spacewalk lasts between five and eight hours, making fatigue a serious concern.Then there is orientation. The crews are not venturing outside to prove humans can survive in space.