‘Human computer’ Katherine Johnson dies at 101

Photo credit should read MARK RALSTON/AFP via Getty Images NASA mathematician Katherine Johnson, whose calculations helped get the first Americans to space and back safely, died today at the age of 101. Among her many accomplishments, she completed the trajectory analysis for Alan Shepard’s 1961 suborbital flight, which was the first time the US sent a human into space.Her work propelled many of America’s breakthroughs in space exploration
Johnson’s work over 33 years propelle