It is easy to conjure up images of astronauts working in space, but there are also astronauts living and working on the _____1________, where they conduct experiments to prepare for ____________2___________. Hadfield's team includes a NASA astronaut, an _________3__________ and a scientist. It is the ________4_______ that looks out into the pale blue water that provides the biggest clue to Hadfield's whereabouts. Meanwhile, Hadfield is working to develop a more ________5_____________ that would allow astronauts to travel beyond the International Space Station. Crew members also study the ways their bodies react to___________6_____________ and changes in pressure by monitoring their heartbeats and using radar to chart their blood flow. At the end of the mission they will ascend to the _______7__________over the course of about 16 hours, at a rate of roughly one meter per hour, so their bodies can adjust to the changes in pressure.