Six healthy men entered a simulated Mars spacecraft in 2010. Within three months they were moving less, and over 520 days the crew slept and rested progressively more—a slide into what researchers called “behavioural torpor,” possibly driven by confinem - Space Daily

Six men sealed inside a simulated Mars spacecraft became progressively less active across 520 days. From the first 130-day mission quarter to the last, active waking fell by 7 percent, equivalent to …