Vera Rubin — American Scientist born on August 23, 1928,

Vera Rubin is an American astronomer who pioneered work on galaxy rotation rates. She uncovered the discrepancy between the predicted angular motion of galaxies and the observed motion, by studying galactic rotation curves. This phenomenon became known as the galaxy rotation problem... (wikipedia)

Science progresses best when observations force us to alter our preconceptions.
No observational problem will not be solved by more data.
Does Sex Matter? Of course it does. But does it matter enough to Matter? That's a different question.