The front brakes vs rear brakes comparison has everything to do with friction and heat. From a physics standpoint, the brakes on your car are designed to convert the kinetic energy of your moving vehicle into heat energy, via friction. The result of that energy conversion is what brings your car to a stop.
Mae C. Jemison is the first African-American female astronaut. In 1992, she flew into space aboard the Endeavour, becoming the first African-American woman in space.
Mae Jemison was born in Decatur, Alabama on October 17, 1956. She was the youngest of three children. The Jemison family moved to Chicago when Mae was only three. It was in Chicago that an uncle introduced her to the world of science. At a very early age, Mae developed interests in anthropology, archaeology, and astronomy that she pursued throughout her childhood.