As NASA's ISS celebrates 25 years of humans living in space, what's ahead for space stations

It's official. Not a single person under the age of 25 has lived a day where there has not been a human orbiting Earth − and that is likely to never change. On Nov. 2, 2000, Expedition 1 arrived at the still-under-construction International Space Station. And since that day, this outpost that orbits 250 miles above the Earth has never been uninhabited even as its construction continued. That's almost 25 years of human life traveling around the Earth 16 times a day. More

(Source: Yahoo News - Oct 6)