Pic of Sunita Williams, stuck in space since June 6, sparks health concerns

A picture of NASA astronaut Sunita Williams, who has spent over 150 days in space, has sparked health concerns. Pulmonologist Dr Vinay Gupta told Daily Mail, "What I can discern by her face and...cheeks being sunken...is that she's probably been at a significant [calorie] deficit." Human body burns more calories in space as it adjusts to gravity and temperature changes.