31.   But with space travel, it appears, things may change.

32.   Can a bizarre spacecraft that is powered by a rotating rocket engine and that lands like a helicopter transform space travel?

33.   Consider our preoccupation with space travel and other fantasy technologies.

34.   Cover piece looks at how long-term space travel affects astronauts.

35.   Commercial development of space travel would help pay the bills, Mankins says.

36.   Cronkite talks affably about presidential elections, the Vietnam War, space travel, the Beatles, Frank Sinatra and much else.

37.   Even with his own strong passion for space travel, Ross realizes his upcoming mission could be his last because there are so many younger astronauts waiting for assignments.

38.   For reasons that remain unclear, space travel induces a series of ailments surprisingly similar to some of the classic problems of old age.

39.   For Ms. Adams, who formerly designed skyscrapers in Japan, space travel raises provocative questions about the nature of humanity.

40.   Glenn failed to convince Rick Tomlinson, president of the Space Frontier Foundation, which promotes opening space travel to civilians.