Stranded Nasa astronauts to finally return to Earth after nine months in space - Butch Wilmore and Suni Williams have been at the International Space Station for nine months

In a news briefing following the landing, Nasa spokesperson Steve Stich said: "From a human perspective, all of us feel happy about the successful landing, but then there's a piece of us - all of us - that wish it would have been the way we had planned it.

The overly sterile environment of the International Space Station is missing important microbes, a new detailed map shows. If we want to live off Earth, we may need to take more of our bacterial frien