Russian cosmonaut Valentina Tereshkova became the first woman to fly in space on June 16, 1963. For 19 years, she was the only woman to have flown in space.
People (men) still tried to say women were not suited for space, even though Valentina orbited the earth 48 times and spent almost three days aloft, and in a single flight, logged more orbits and flight time than that of all American astronauts who had flown before her before returning to Earth under manual control.
She was also the first to wear a mission emblem on her spacesuit (it was hidden, though)
"It is I, Seagull!" she called (also the name of her biography, which I still have.)
At 76 years old, she has offered to make the (one-way) journey to Mars.