Well, actually Shannon Lucid was on Mir for a long-duration flight, not ISS. <img src="/images/icons/wink.gif" /> (Sorry, couldn't resist.) And of course Peggy Whitson served about the ISS as a long-duration science officer.<br /><br />The percentage of males to females in the astronaut corps tends to favor males anyway, so it's not really a surprise that so many of the crew to date have been male. It's simple demographics. The skew is far more pronounced among the Russians: even Three-Fingered Jack could have counted the Russian female cosmonauts who've actually flown in space on the fingers of one hand: Valentina Tereshkova, Svetlana Savitskaya, and Yelena Kondakova. (Kondakova is the only Russian woman to have made a long-duration flight.) Outside of Russia and the US, there have been a handful of other women: French astronaut Claudie Hagniere (wife of astronaut Jean-Pierre Haignere), Japanese astronaut Chiaki Muka, Canadians Robera Bondar and Julie Payette, and British astronaut Helen Sharman.<br /><br />Women who have made long-duration flights, in order of their total spaceflight hours, from most to least:<br /><br />Shanon Lucid (Mir -- Lucid also holds the female record for cumulative spaceflight hours)<br />Susan Helms (ISS)<br />Peggy Whitson (ISS)<br />Yelena Kondakova (Mir -- returned to Earth aboard Atlantis, putting her on the short list of Russians who have flown on Shuttle) <div class="Discussion_UserSignature"> <p> </p><p><font color="#666699"><em>"People assume that time is a strict progression of cause to effect, but actually from a non-linear, non-subjective viewpoint it's more like a big ball of wibbly wobbly . . . timey wimey . . . stuff."</em> -- The Tenth Doctor, "Blink"</font></p> </div>