To learn more about what's happening on the International Space Station at any given time, check out NASA's frequently-updated ISS blog or their page about the research and development work happening on ISS.
Depends on your body type and metabolism and your routine. But usually it takes around 3 to 4 weeks for visible results. For me it took me a couple of months to actually see any progress visually.
How long does it take to see results from working out as a teen? How long will it take before you start seeing results from going to the gym? Will I see results for working out 30 mins a day per week?