- Sam Landers, Tom Maday
By: Helaine Becker, Dow Phumiruk
Counting on Katherine: How Katherine Johnson Saved Apollo 13
The story of Katherine Johnson, an African-American mathematician who worked for NASA during the space race and was depicted in the book and film Hidden Figures.
You've likely heard of the historic Apollo 13 moon landing. But do you know about the mathematical genius who mad
