Women with very significant contributions from only post-1900 when women were actually allowed to have a voice in these fields:
Sciences (Physics, Chemistry, Neuroscience, Math, etc):
Lise Meitner
Vera Rubin
Lene Hau
Deborah Jin
Jocelyn Bell
Lisa Randall
Nergis Mavalvala
Margaret Burbridge
Marie Curie
Irene Curie
Ada Yonath
Fabiola Gianotti
Margaret Murnane
Maria Goeppert Mayer
Dorothy Hodgkin
Andrea Ghez
Chien-Shiung Wu
Mildred Dresselhaus
Ana Maria Rey
Margaret Geller
Helen Quinn
Beth Stevens
Danielle Bassett
Melody Swartz
Julia Robinson
Maria Chudnovsky
Claire Gmachl
etc
Philosophy:
Simone De Beauvoir
Julie Kristeva
Judith Butler
Hannah Arendt
Susan Haack
Mary Midgley
Elizabeth Anscombe
Simone Weil
Luce Irigaray
Ayn Rand
etc
Literature:
The list is well-nigh endless.
No contributions? Right... Ignorance at its finest.
What a cesspit. See ya.