Why can't astronauts walk after returning to Earth?

NASA astronauts Sunita Williams, Butch Wilmore, and Nick Hague are scheduled for splashdown on March 19 at 3.27am IST. Post-landing, they will face challenges like muscle deterioration, bone density loss, fluid redistribution, and disorientation. To recover, they undergo physical therapy to rebuild strength, balance training to retrain the vestibular system, and cardiovascular exercises to regain circulatory efficiency.

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What are tears? Are the emotional sobs and tears from chopping onions the same?

Tears are more than just salty water; they're your body's versatile tool. From constant lubrication to flushing irritants and even r...