Bengaluru, June 26 -- "The first sensation when you go to space is weightlessness," says Dr Annapurni Subramaniam, Director of the Indian Institute of Astrophysics. "And that changes everything-how humans function, how plants grow, how materials behave." As Indian Air Force Group Captain Shubhanshu Shukla begins his 14-day stay aboard the International Space Station (ISS) as part of the Axiom-4 mission, Dr Annapurni says this is not just a symbolic homecoming to space, but a critical moment in decoding how human life can adapt beyond Earth. "The human body has evolved under gravity. When you take that away, every physiological system is affected, from bones and muscles to blood flow, balance, and immunity," she told reporters. "That's why t...