Eleanor Sidgwick (1845-1936) was a prominent British philosopher and psychologist known for her work in the field of psychical research. She was a co-founder of the Society for Psychical Research in 1882, which aimed to investigate paranormal phenomena through scientific methods. Sidgwick was also an advocate for women's education and played a significant role in promoting the inclusion of women in higher education. In addition to her research, Sidgwick was a key figure in the Cambridge University community, where she contributed to the development of the Newnham College. Her writings often focused on the intersection of science and spirituality, and she is remembered for her rigorous approach to exploring the unknown.