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Kya aap jaante hain ki antariksh mein jaane ke baad insaan ki lambai achanak badh jaati hai? Ji haan, NASA ke anusaar antariksh yaatri wahan lagbhag 2 inch tak lambe ho jaate hain. Iska kaaran hai “gravity” yani gurutvakarshan ki kami. Dharti par gravity hamari reedh ki haddi yani spine ko neeche ki taraf daba kar rakhti hai. Lekin space mein zero gravity hone ki wajah se hamari spine phailne lagti hai, jisse lambai badh jaati hai. Halaanki, dharti par lautte hi lambai phir se normal ho jaati ha